[master] cd2e297 Reflect new C: close default in vcl_pipe

[Lasse Karstensen]

commit cd2e297fabde5356d906abb9d44f803263bcd730
Author: Lasse Karstensen <lkarsten at varnish-software.com>
Date:   Thu Mar 20 11:20:50 2014 +0100

    Reflect new C: close default in vcl_pipe
    
    We now set Connection: Close on all piped backend requests, to avoid some of
    the debugging pain seen over the last 2-3 years.
    
    Basic problem is that request backend routing done in vcl_recv would not be
    honored for subsequent requests after one was piped.
    
    This was, at least for new users, a rather nasty surprise.
    
    Original change in commit 880c3c2.

diff --git a/bin/varnishd/builtin.vcl b/bin/varnishd/builtin.vcl
index 8e5ca36..3949689 100644
--- a/bin/varnishd/builtin.vcl
+++ b/bin/varnishd/builtin.vcl
@@ -67,12 +67,11 @@ sub vcl_recv {
 }
 
 sub vcl_pipe {
-    # Note that only the first request to the backend will have
-    # X-Forwarded-For set.  If you use X-Forwarded-For and want to
-    # have it set for all requests, make sure to have:
-    # set bereq.http.connection = "close";
-    # here.  It is not set by default as it might break some broken web
-    # applications, like IIS with NTLM authentication.
+    # By default Connection: close is set on all piped requests, to stop
+    # connection reuse from sending future requests directly to the
+    # (potentially) wrong backend. If you do want this to happen, you can undo
+    # it here.
+    # unset bereq.http.connection;
     return (pipe);
 }