Peter Sylvester brought code that now allows a callback to modified the URL

even when the multi interface is used, and then libcurl will simulate a
"follow location" to that new URL. Test 509 was added to test this feature.

tests/data/Makefile.am

@@ -24,4 +24,4 @@ test62 test63 test64 test65 test66 test144 test145 test67 test68 test41 \
 test40 test42 test69 test70 test71 test72 test73 test146 test505 \
 test74 test75 test76 test77 test78 test147 test148 test506 test79 test80 \
 test81 test82 test83 test84 test85 test86 test87 test507 test149 test88 \
-test89 test90 test508 test91 test92 test203 test93 test94 test95
+test89 test90 test508 test91 test92 test203 test93 test94 test95 test509

tests/data/test509

@@ -0,0 +1,51 @@
+#
+# Server-side
+<reply>
+<data>
+HTTP/1.1 200 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Server: localhost:8433
+Content-length:6
+
+Hello
+</data>
+<datacheck>
+Hello
+</datacheck>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+https
+</server>
+<features>
+SSL
+</features>
+<tool>
+lib509
+</tool>
+
+ <name>
+simple HTTPS GET and URL redirect in certificate
+ </name>
+ <command>
+https://localhost:%HTTPSPORT/dvcs
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent:.*
+</strip>
+<protocol>
+GET /509 HTTP/1.1
+Host: localhost:8433
+Pragma: no-cache
+Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*
+
+</protocol>
+</verify>