Fix for MODCLUSTER-372.

Conflicts:
	native/mod_proxy_cluster/mod_proxy_cluster.c
Fix for MODCLUSTER-388.
Remove another side effect related to MODCLUSTER-388.
Merge pull request #64 from Karm/1.2.x

Ported Jean-Frederic's Fix for MODCLUSTER-372 from master to 1.2.x branch