Port d7 commits to master

[wellebee]

This PR ports several D7 enhancements to the master branch. As far as I can tell, my changes will bring master current with D7.

The following is a list of the associated D7 commits addressed by my 5 commits.

Revert obsolete directive: https://github.com/perusio/drupal-with-nginx/commit/97d586c4513931c6050c76b4b6f3bfd93e256c9c

Ports: https://github.com/perusio/drupal-with-nginx/commit/3009c0e80bca953391e0f1fcf42ce70cff1c6d34 https://github.com/perusio/drupal-with-nginx/commit/86799cb6af43ca67bf16e02fcf95e8fde4af1a43 https://github.com/perusio/drupal-with-nginx/commit/22a63186ae3769959f18c67f9a2cb80428d32e3d https://github.com/perusio/drupal-with-nginx/commit/1fbf361b95371b2623cc8090d8efc8febd1ec566

[wellebee]

Superseded by https://github.com/perusio/drupal-with-nginx/pull/239.