[MODCLUSTER-423] If using a specific port enable SO_REUSEADDR to avoid "Address already in use" errors
Merge pull request #114 from rhusar/MODCLUSTER-423_reuse_address

[MODCLUSTER-423] If using a specific port enable SO_REUSEADDR to avoid "...
Update version in mod_proxy_cluster.h
[maven-release-plugin] prepare release 1.3.1.Alpha2
[maven-release-plugin] prepare for next development iteration
Fix MODCLUSTER-428.
Adjust the version.
Merge pull request #115 from jfclere/master

Fix MODCLUSTER-428.