Deny crawlers on search results pages as they may cause very high load on sites with non-English default lang because of the amount of not cached queries on the url_alias table (Nginx)

This reverts commit 6cab1605.

Issue #1555398 - ensure the master server in a Pack is given a MySQL GRANT, if it was not also @server_master

Issue #1573004 by cafuego - provision-migrate fails with 'Dummy connection failed to fail: mysql: option -e' requires an argument on Debian Wheezy

Issue #1552228 by omega8cc - Nginx configuration for limit_conn should be compatible with version >= 1.1.8

Issue #1544144 by thsutton - Use $server_name instead of $host in all sites/ paths to avoid broken URLs to static files for domain aliases in D7 (Nginx).

Issue #1528996 by omega8cc - Nginx microcaching should use fastcgi_cache_valid with 5s only for 403 error.

This reverts commit 0a4d405c.

This reverts commit 745f476c.

Issue #1528996 by omega8cc - Nginx microcaching should use fastcgi_cache_valid with 1s only for upstream errors.

Issue #1534306 by omega8cc - Duplicate directives in the Nginx config cause issues with recommended Dotdeb Nginx build.

Issue #1472460 by dmiric and #1524738 by flexgrip - Nginx configuration denies HTTP request methods: PUT, DELETE and OPTIONS and it breaks services/REST.

Issue #1528996 and #1527852 by PlayfulWolf - Nginx microcaching shouldn't cache any upstream errors.

Use higher values for limit_conn to avoid issues when there are many files included in the page and to better support advagg module.