code/docs: Use Unix rather than UNIX to avoid use of the trademark

Use Unix when generically writing about Unix based systems as UNIX is
the trademark and should only be used in a particular product's name.

tests/FILEFORMAT

@@ -333,7 +333,7 @@ Available substitute variables include:
 %HOSTIP       - IPv4 address of the host running this test
 %HTTP6PORT    - IPv6 port number of the HTTP server
 %HTTPPIPEPORT - Port number of the HTTP pipelining server
-%HTTPUNIXPATH - Path to the UNIX socket of the HTTP server
+%HTTPUNIXPATH - Path to the Unix socket of the HTTP server
 %HTTPPORT     - Port number of the HTTP server
 %HTTPSPORT    - Port number of the HTTPS server
 %HTTPTLS6PORT - IPv6 port number of the HTTP TLS server

tests/README

@@ -81,7 +81,7 @@ The cURL Test Suite
   machine, or just move the servers in case you have local services on any of
   those ports.
 
-  The HTTP server supports listening on a UNIX domain socket, the default
+  The HTTP server supports listening on a Unix domain socket, the default
   location is 'http.sock'.
 
  1.4 Run

tests/data/test1435

@@ -25,7 +25,7 @@ unix-sockets
 http-unix
 </server>
  <name>
-simple HTTP GET over UNIX socket
+simple HTTP GET over Unix socket
  </name>
  <command>
 --unix-socket %HTTPUNIXPATH http://server-interpreted.example.com/1435

tests/data/test1436

@@ -39,7 +39,7 @@ unix-sockets
 http-unix
 </server>
  <name>
-HTTP requests with multiple connections over UNIX socket
+HTTP requests with multiple connections over Unix socket
  </name>
  <command>
 --unix-socket %HTTPUNIXPATH http://one.example.com/14360001 http://two.example.com/14360002 http://one.example.com/14360003

tests/data/test2013

@@ -35,7 +35,7 @@ file
 Metalink
 </features>
  <name>
-Metalink local XML file, attempt UNIX absolute path
+Metalink local XML file, attempt Unix absolute path
  </name>
 <command option="no-output,no-include">
 --metalink file://%PWD/log/test2013.metalink

tests/data/test2014

@@ -35,7 +35,7 @@ file
 Metalink
 </features>
  <name>
-Metalink local XML file, attempt UNIX path relative to current
+Metalink local XML file, attempt Unix path relative to current
  </name>
 <command option="no-output,no-include">
 --metalink file://%PWD/log/test2014.metalink

tests/data/test2015

@@ -35,7 +35,7 @@ file
 Metalink
 </features>
  <name>
-Metalink local XML file, attempt UNIX path relative to upper
+Metalink local XML file, attempt Unix path relative to upper
  </name>
 <command option="no-output,no-include">
 --metalink file://%PWD/log/test2015.metalink

tests/data/test2016

@@ -35,7 +35,7 @@ file
 Metalink
 </features>
  <name>
-Metalink local XML file, attempt UNIX path traversal
+Metalink local XML file, attempt Unix path traversal
  </name>
 <command option="no-output,no-include">
 --metalink file://%PWD/log/test2016.metalink

tests/data/test2017

@@ -35,7 +35,7 @@ file
 Metalink
 </features>
  <name>
-Metalink local XML file, attempt UNIX home path traversal
+Metalink local XML file, attempt Unix home path traversal
  </name>
 <command option="no-output,no-include">
 --metalink file://%PWD/log/test2017.metalink

tests/data/test2018

@@ -35,7 +35,7 @@ file
 Metalink
 </features>
  <name>
-Metalink local XML file, attempt UNIX questionable file name I
+Metalink local XML file, attempt Unix questionable file name I
  </name>
 <command option="no-output,no-include">
 --metalink file://%PWD/log/test2018.metalink

tests/data/test2019

@@ -35,7 +35,7 @@ file
 Metalink
 </features>
  <name>
-Metalink local XML file, attempt UNIX questionable file name II
+Metalink local XML file, attempt Unix questionable file name II
  </name>
 <command option="no-output,no-include">
 --metalink file://%PWD/log/test2019.metalink

tests/data/test2020

@@ -35,7 +35,7 @@ file
 Metalink
 </features>
  <name>
-Metalink local XML file, attempt UNIX questionable file name III
+Metalink local XML file, attempt Unix questionable file name III
  </name>
 <command option="no-output,no-include">
 --metalink file://%PWD/log/test2020.metalink

tests/data/test2021

@@ -35,7 +35,7 @@ file
 Metalink
 </features>
  <name>
-Metalink local XML file, attempt UNIX questionable file name IV
+Metalink local XML file, attempt Unix questionable file name IV
  </name>
 <command option="no-output,no-include">
 --metalink file://%PWD/log/test2021.metalink

tests/data/test2022

@@ -35,7 +35,7 @@ file
 Metalink
 </features>
  <name>
-Metalink local XML file, attempt UNIX questionable file name V
+Metalink local XML file, attempt Unix questionable file name V
  </name>
 <command option="no-output,no-include">
 --metalink file://%PWD/log/test2022.metalink

tests/data/test574

@@ -25,7 +25,7 @@ ftp
 lib574
 </tool>
 <name>
-FTP wildcard download - changed fnmatch, 2x perform (UNIX LIST response)
+FTP wildcard download - changed fnmatch, 2x perform (Unix LIST response)
 </name>
 <command>
 ftp://%HOSTIP:%FTPPORT/fully_simulated/UNIX/*.txt

tests/data/test576

@@ -22,7 +22,7 @@ ftp
 lib576
 </tool>
  <name>
-FTP wildcard download - skip/parser_correctness/CURLOPT_FNMATCH_FUNCTION (UNIX)
+FTP wildcard download - skip/parser_correctness/CURLOPT_FNMATCH_FUNCTION (Unix)
  </name>
  <command>
 ftp://%HOSTIP:%FTPPORT/fully_simulated/UNIX/*

tests/httpserver.pl

@@ -36,7 +36,7 @@ use serverhelp qw(
 
 my $verbose = 0;     # set to 1 for debugging
 my $port = 8990;     # just a default
-my $unix_socket;     # location to place a listening UNIX socket
+my $unix_socket;     # location to place a listening Unix socket
 my $ipvnum = 4;      # default IP version of http server
 my $idnum = 1;       # dafault http server instance number
 my $proto = 'http';  # protocol the http server speaks

tests/runtests.pl

@@ -141,7 +141,7 @@ my $HTTPTLSPORT;         # HTTP TLS (non-stunnel) server port
 my $HTTPTLS6PORT;        # HTTP TLS (non-stunnel) IPv6 server port
 my $HTTPPROXYPORT;       # HTTP proxy port, when using CONNECT
 my $HTTPPIPEPORT;        # HTTP pipelining port
-my $HTTPUNIXPATH;        # HTTP server UNIX domain socket path
+my $HTTPUNIXPATH;        # HTTP server Unix domain socket path
 
 my $srcdir = $ENV{'srcdir'} || '.';
 my $CURL="../src/curl".exe_ext(); # what curl executable to run on the tests
@@ -203,12 +203,12 @@ my $ssl_version;    # set if libcurl is built with SSL support
 my $large_file;     # set if libcurl is built with large file support
 my $has_idn;        # set if libcurl is built with IDN support
 my $http_ipv6;      # set if HTTP server has IPv6 support
-my $http_unix;      # set if HTTP server has UNIX sockets support
+my $http_unix;      # set if HTTP server has Unix sockets support
 my $ftp_ipv6;       # set if FTP server has IPv6 support
 my $tftp_ipv6;      # set if TFTP server has IPv6 support
 my $gopher_ipv6;    # set if Gopher server has IPv6 support
 my $has_ipv6;       # set if libcurl is built with IPv6 support
-my $has_unix;       # set if libcurl is built with UNIX sockets support
+my $has_unix;       # set if libcurl is built with Unix sockets support
 my $has_libz;       # set if libcurl is built with libz support
 my $has_getrlimit;  # set if system has getrlimit()
 my $has_ntlm;       # set if libcurl is built with NTLM support
@@ -317,7 +317,7 @@ my $USER = $ENV{USER};          # Linux
 if (!$USER) {
     $USER = $ENV{USERNAME};     # Windows
     if (!$USER) {
-        $USER = $ENV{LOGNAME};  # Some UNIX (I think)
+        $USER = $ENV{LOGNAME};  # Some Unix (I think)
     }
 }
 
@@ -726,7 +726,7 @@ sub verifyhttp {
     my $server = servername_id($proto, $ipvnum, $idnum);
     my $pid = 0;
     my $bonus="";
-    # $port_or_path contains a path for UNIX sockets, sws ignores the port
+    # $port_or_path contains a path for Unix sockets, sws ignores the port
     my $port = ($ipvnum eq "unix") ? 80 : $port_or_path;
 
     my $verifyout = "$LOGDIR/".
@@ -1215,7 +1215,7 @@ sub runhttpserver {
         $verbose_flag .= "1 ";
     }
     elsif($alt eq "unix") {
-        # IP (protocol) is mutually exclusive with UNIX sockets
+        # IP (protocol) is mutually exclusive with Unix sockets
         $ipvnum = "unix";
     }
 
@@ -2118,7 +2118,7 @@ sub responsive_http_server {
         $idnum = 2;
     }
     elsif($alt eq "unix") {
-        # IP (protocol) is mutually exclusive with UNIX sockets
+        # IP (protocol) is mutually exclusive with Unix sockets
         $ipvnum = "unix";
     }
 
@@ -2373,7 +2373,7 @@ sub checksystem {
 
             # Generate a "proto-ipv6" version of each protocol to match the
             # IPv6 <server> name and a "proto-unix" to match the variant which
-            # uses UNIX domain sockets. This works even if support isn't
+            # uses Unix domain sockets. This works even if support isn't
             # compiled in because the <features> test will fail.
             push @protocols, map(("$_-ipv6", "$_-unix"), @protocols);
 
@@ -2548,7 +2548,7 @@ sub checksystem {
     }
 
     if($has_unix) {
-        # client has UNIX sockets support, check whether the HTTP server has it
+        # client has Unix sockets support, check whether the HTTP server has it
         my @sws = `server/sws --version`;
         $http_unix = 1 if($sws[0] =~ /unix/);
     }
@@ -2584,7 +2584,7 @@ sub checksystem {
     logmsg sprintf("  track memory: %s\n", $has_memory_tracking?"ON ":"OFF");
     logmsg sprintf("* valgrind:     %8s", $valgrind?"ON ":"OFF");
     logmsg sprintf("  HTTP IPv6     %s\n", $http_ipv6?"ON ":"OFF");
-    logmsg sprintf("* HTTP UNIX     %s\n", $http_unix?"ON ":"OFF");
+    logmsg sprintf("* HTTP Unix     %s\n", $http_unix?"ON ":"OFF");
     logmsg sprintf("* FTP IPv6      %8s", $ftp_ipv6?"ON ":"OFF");
     logmsg sprintf("  Libtool lib:  %s\n", $libtool?"ON ":"OFF");
     logmsg sprintf("* Shared build:      %-3s", $has_shared);
@@ -2638,9 +2638,9 @@ sub checksystem {
     logmsg sprintf("*   HTTP-PIPE/%d \n", $HTTPPIPEPORT);
 
     if($has_unix) {
-        logmsg "* UNIX socket paths:\n";
+        logmsg "* Unix socket paths:\n";
         if($http_unix) {
-            logmsg sprintf("*   HTTP-UNIX:%s\n", $HTTPUNIXPATH);
+            logmsg sprintf("*   HTTP-Unix:%s\n", $HTTPUNIXPATH);
         }
     }
 
@@ -2692,7 +2692,7 @@ sub subVariables {
   $$thing =~ s/%TFTP6PORT/$TFTP6PORT/g;
   $$thing =~ s/%TFTPPORT/$TFTPPORT/g;
 
-  # server UNIX domain socket paths
+  # server Unix domain socket paths
 
   $$thing =~ s/%HTTPUNIXPATH/$HTTPUNIXPATH/g;
 
@@ -4962,7 +4962,7 @@ $HTTPTLSPORT     = $base++; # HTTP TLS (non-stunnel) server port
 $HTTPTLS6PORT    = $base++; # HTTP TLS (non-stunnel) IPv6 server port
 $HTTPPROXYPORT   = $base++; # HTTP proxy port, when using CONNECT
 $HTTPPIPEPORT    = $base++; # HTTP pipelining port
-$HTTPUNIXPATH    = 'http.sock'; # HTTP server UNIX domain socket path
+$HTTPUNIXPATH    = 'http.sock'; # HTTP server Unix domain socket path
 
 #######################################################################
 # clear and create logging directory:

tests/server/sws.c

@@ -1368,7 +1368,7 @@ static curl_socket_t connect_to(const char *ipaddr, unsigned short port)
 #endif /* ENABLE_IPV6 */
 #ifdef USE_UNIX_SOCKETS
   case AF_UNIX:
-    logmsg("Proxying through UNIX socket is not (yet?) supported.");
+    logmsg("Proxying through Unix socket is not (yet?) supported.");
     return CURL_SOCKET_BAD;
 #endif /* USE_UNIX_SOCKETS */
   }
@@ -2163,7 +2163,7 @@ int main(int argc, char *argv[])
         goto sws_cleanup;
       }
       /* socket server is not alive, now check if it was actually a socket.
-       * Systems which have UNIX sockets will also have lstat */
+       * Systems which have Unix sockets will also have lstat */
       rc = lstat(unix_socket, &statbuf);
       if (0 != rc) {
         logmsg("Error binding socket, failed to stat %s: (%d) %s",
@@ -2208,7 +2208,7 @@ int main(int argc, char *argv[])
   }
 
 #ifdef USE_UNIX_SOCKETS
-  /* listen succeeds, so let's assume a valid listening UNIX socket */
+  /* listen succeeds, so let's assume a valid listening Unix socket */
   unlink_socket = true;
 #endif
 

tests/server/tftpd.c

@@ -1371,7 +1371,7 @@ abort:
 
 /*
  * Send a nak packet (error message).  Error code passed in is one of the
- * standard TFTP codes, or a UNIX errno offset by 100.
+ * standard TFTP codes, or a Unix errno offset by 100.
  */
 static void nak(int error)
 {