[4.1] b26f9ff Don't insist headers have a space after the colon.

[Poul-Henning Kamp]

commit b26f9fff4877fbe1001c7f995df98f9241914e12
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Mon Aug 3 12:55:44 2015 +0000

    Don't insist headers have a space after the colon.
    
    Fixes #1765

diff --git a/bin/varnishd/cache/cache_http.c b/bin/varnishd/cache/cache_http.c
index 05edd1b..e832992 100644
--- a/bin/varnishd/cache/cache_http.c
+++ b/bin/varnishd/cache/cache_http.c
@@ -927,9 +927,8 @@ HTTP_GetHdrPack(struct worker *wrk, struct objcore *oc, const char *hdr)
 	while (*ptr != '\0') {
 		if (!strncasecmp(ptr, hdr, l)) {
 			ptr += l;
-			assert (vct_issp(*ptr));
-			ptr++;
-			assert (!vct_issp(*ptr));
+			while (vct_islws(*ptr))
+				ptr++;
 			return (ptr);
 		}
 		ptr = strchr(ptr, '\0') + 1;
diff --git a/bin/varnishtest/tests/r01765.vtc b/bin/varnishtest/tests/r01765.vtc
new file mode 100644
index 0000000..e3d8323
--- /dev/null
+++ b/bin/varnishtest/tests/r01765.vtc
@@ -0,0 +1,27 @@
+varnishtest "subset headers in packed format"
+
+server s1 {
+	rxreq
+	txresp	-hdr "Foo:bar"
+	rxreq
+	txresp	-hdr "Foo:bax"
+} -start
+
+varnish v1 -vcl+backend {
+	sub vcl_hit {
+		if (obj.http.foo == "bar") {
+			return (pass);
+		}
+	}
+} -start
+
+client c1 {
+	txreq
+	rxresp
+	expect resp.http.foo == bar
+	txreq
+	rxresp
+	expect resp.http.foo == bax
+} -run
+
+delay 1