runtests: set web.ipv6 if we use IPv6 As explained by the previous patch, we need to set "web.ipv6=True" if we decide to use IPv6. Otherwise "hg serve" will still try to listen on IPv4. This patch makes it so by appending web.ipv6 to "extra configs". This patch was tested in a Linux system with IPv6, by the following steps: 1. Change hgweb/server.py temporarily to write a file if IPv6HTTPServer.__init__ is called. 2. run-tests.py -l --keep-tmpdir test-serve.t 3. Check the generated .hgrc, make sure it sets web.ipv6=1. 4. Check the log file to make sure IPv6HTTPServer.__init__ is called.

--- a/tests/test-config.t	Wed Feb 15 16:22:22 2017 -0800
+++ b/tests/test-config.t	Wed Feb 15 16:43:27 2017 -0800
@@ -58,12 +58,12 @@
   [
    {
     "name": "Section.KeY",
-    "source": "*.hgrc:16", (glob)
+    "source": "*.hgrc:*", (glob)
     "value": "Case Sensitive"
    },
    {
     "name": "Section.key",
-    "source": "*.hgrc:17", (glob)
+    "source": "*.hgrc:*", (glob)
     "value": "lower case"
    }
   ]
@@ -71,7 +71,7 @@
   [
    {
     "name": "Section.KeY",
-    "source": "*.hgrc:16", (glob)
+    "source": "*.hgrc:*", (glob)
     "value": "Case Sensitive"
    }
   ]