Remove default <proxy *> block

This is a horrible and generally useless default. Most people do *not*
use apache httpd as Forward proxy, and those who do, should explicitly
set an allow. That this is exactly what our new, and backward
compatible proxy config does, and allows, while widly simplifying the
reverse proxy configurations.

We add a test case for new proxy configuration to make sure this is
actually the case, and also fix a test case from a previious commit.
Added a parameter that allow to precise if the apache package should be
only installed or rather at the lastest release.
Removed extra comma that made spec tests fails under ruby 1.8.7
Merge pull request #345 from igalic/proxy_block

Remove default <proxy *> block
Support FallbackResource (httpd >= 2.2.16)

Starting Apache httpd 2.2.16, FallbackResource is a much simpler way of
configuring a very common pattern usually implemented with RewriteRules.

Sending all requests to one router that then dispaches all requests can
now be done with a single line:

    FallbackResource /index.php

We now support this directive with the apache::vhost parameter
fallbackresource, which can be used like this:

    apache::vhost { 'wordpress.example.com':
      documentroot     => '/var/www/wp',
      fallbackresource => '/index.php',
    }

fallbackresource is also a valid prameter in directories, where at
different levels it either can be overwritten, or `disabled`.
Merge pull request #382 from godp1301/master

Added a parameter that allow to precise package ensure
EL5 and EL6 both use /etc/pki/tls/certs.
Merge pull request #383 from igalic/fallbackresource

Support FallbackResource (httpd >= 2.2.16)
Merge pull request #384 from razorsedge/ssl_certs_dir

EL5 and EL6 both use /etc/pki/tls/certs.