templatize the envvars file

The envvars file (typically installed into /etc/apache2/envvars) sets some environment variables that are used by the init script.

It sets the user to run as, group, pidfile location, etc.

Previous versions of the cookbook didn't include this file, so the init system would be using the wrong pidfile location, for example, and wouldn't know how to stop/restart apache.

This version uses the same values that are used in the rest of the apache2 configuration.
FIX: Typo in mod_pagespeed.rb

`Chef::Log.warm` should be `Chef::Log.warn`
only turn rewrite on once
locking yum dependency to < 3
Version bump to v1.8.6
Version bump to v1.8.8
Version bump to v1.8.9
fixing metadata version error. locking to 3.0
Version bump to v1.8.10
fixing style issues for travis
Version bump to v1.8.12
Version bump to v1.8.14
Version bump to v1.8.15
first commit for apache 2.4 support, still need to test backwards compatibility
updated authors and reverted version (for now)
add back apache 2.2 SSLMutex directives
added authz_default -> authz_core backwards compatibility
typo for mod_wstunnel
fix merge fail: missing end in status.conf
minimize changes in brackets