Modified the FTP server to use the new 'sockfilt' program to do all the socket

level stuff. The FTP server communicates with sockfilt using perl's open2().
This enables easier IPv6 support and hopefully FTP-SSL support in the future.
Added four test cases for FTP-ipv6.

tests/data/test103

@@ -26,8 +26,8 @@ ftp://%HOSTIP:%FTPPORT/a/path/103 -P -
 # Verify data after the test has been "shot"
 <verify>
 <strippart>
-s/^LPRT.*[\n]//
-s/^EPRT.*[\n]//
+s/^LPRT.*/LPRT/
+s/^EPRT.*/EPRT/
 s/^(PORT 127,0,0,1,)([0-9,]+)/$1/
 </strippart>
 <protocol>
@@ -36,6 +36,8 @@ PASS curl_by_daniel@haxx.se
 PWD
 CWD a
 CWD path
+EPRT
+LPRT
 PORT 127,0,0,1,
 TYPE I
 SIZE 103