test1509: verify proxy header response headers count

Modified sws to support and use custom CONNECT responses instead of the
previously naive hard-coded version. Made the HTTP test server able to
extract test case number from the host name in a CONNECT request by
finding the number after the last dot. It makes 'machine.moo.123' use
test case 123.

Adapted a larger amount of tests to the new <connect> style.

Bug: http://curl.haxx.se/bug/view.cgi?id=1204
Reported by: Martin Jansen

tests/data/test83

@@ -21,6 +21,10 @@ Content-Length: 9
 
 contents
 </data>
+<connect>
+HTTP/1.1 200 Mighty fine indeed
+
+</connect>
 <datacheck>
 HTTP/1.1 200 Mighty fine indeed
 
@@ -46,7 +50,7 @@ http-proxy
 HTTP over proxy-tunnel with site authentication
  </name>
  <command>
-http://%HOSTIP:%HTTPPORT/we/want/that/page/83 -p -x %HOSTIP:%PROXYPORT --user iam:myself
+http://test.83:%HTTPPORT/we/want/that/page/83 -p -x %HOSTIP:%PROXYPORT --user iam:myself
 </command>
 </client>
 
@@ -57,9 +61,9 @@ http://%HOSTIP:%HTTPPORT/we/want/that/page/83 -p -x %HOSTIP:%PROXYPORT --user ia
 ^User-Agent:.*
 </strip>
 <proxy>
-CONNECT %HOSTIP:%HTTPPORT HTTP/1.1
+CONNECT test.83:%HTTPPORT HTTP/1.1
 User-Agent: curl/7.10.7-pre2 (i686-pc-linux-gnu) libcurl/7.10.7-pre2 OpenSSL/0.9.7a zlib/1.1.3
-Host: %HOSTIP:%HTTPPORT
+Host: test.83:%HTTPPORT
 Proxy-Connection: Keep-Alive
 
 </proxy>
@@ -67,7 +71,7 @@ Proxy-Connection: Keep-Alive
 GET /we/want/that/page/83 HTTP/1.1
 Authorization: Basic aWFtOm15c2VsZg==
 User-Agent: curl/7.10.7-pre2 (i686-pc-linux-gnu) libcurl/7.10.7-pre2 OpenSSL/0.9.7a zlib/1.1.3
-Host: %HOSTIP:%HTTPPORT
+Host: test.83:%HTTPPORT
 Accept: */*
 
 </protocol>