Merge branch 'dev-1.8': up to 1.8.31.6

diff --cc apache-mod_pagespeed.spec
index 65f02b3d97b5d5ec30d99495695d51def3e9c970,6240be7cdab443ab92ed553b27836356783a7113..602668edaca18bac2a3ae7918489a416f68effcc
--- 1/apache-mod_pagespeed.spec
--- 2/apache-mod_pagespeed.spec
+++ b/apache-mod_pagespeed.spec
@@@ -18,8 -48,10 +48,10 @@@
  %define               apxs            %{_sbindir}/apxs
  Summary:      Apache module for rewriting web pages to reduce latency and bandwidth
  Name:         apache-mod_%{mod_name}
- Version:      1.5.27.2
- Release:      3
+ # beta: 1.9.32.x-beta
+ # stable: 1.8.31.x
+ Version:      1.8.31.6
 -Release:      0.29
++Release:      1
  License:      Apache v2.0
  Group:                Networking/Daemons/HTTP
  Source0:      modpagespeed-%{version}.tar.xz