Allow specifying "ensure" parameter in apache::mod::php
This fixes issue #326
adopt a more stable proxy configuration

adopt proxy configuration as documented by @niq (Nick Kew)

   http://www.apachetutor.org/admin/reverseproxies documents the

This pattern is more resilient to shaky redirects from the backend
This commit fixes #300.
apache::mod::expires class for easy including
Merge pull request #306 from igalic/proxy_stable

adopt a more stable proxy configuration
Fix invalid variable name in itk mod
Merge pull request #362 from blkperl/fix_invalid_attrs

Fix invalid variable name in itk mod
Merge pull request #338 from MasonM/module_ensure

Allow specifying "ensure" parameter in apache::mod::php
Merge pull request #352 from 3dna/apache_mod_expires

apache::mod::expires class for easy including