Add regression test for #763

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@5335 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishtest/tests/r00763.vtc

+# $Id$
+
+test "Vary header with extra colon"
+
+server s1 {
+	rxreq
+	txresp -hdr "Vary:: foo" -hdr "Foo: bar" -bodylen 9
+} -start
+
+varnish v1 -vcl+backend {} -start
+
+client c1 {
+	txreq
+	rxresp
+	expect resp.http.vary == ": foo"
+} -run
+
+