Update MySqlConnector.php to support Sphinx

Sphinx is one of the 4 main search engines PHP has documented and provides classes for.

http://www.php.net/manual/en/refs.search.php

Sphinx uses the mysql protocol as an interface.  The problem is when passing collate the connection to sphinx fails.  The patch will not include collate in the connection if in the config file its set to null.

Thank you

(Original Ticket #3519)
Return an array with attached, detached and changed relationship IDs on sync
Updated docblock as per bencorlett's & franzliedke's suggestions
Table prefix was missing in BelongsToMany@getRelationCountQueryForSelfJoin

Table prefix was missing in
BelongsToMany@getRelationCountQueryForSelfJoin
Allow pgsql enum fields /w reserved words as names An enum with a name like `unique` would cause an SQL syntax error, so just wrapped that sucker up in double-quotes to make it work.
Merge pull request #3678 from monorigabor/4.1

Table prefix was missing in BelongsToMany@getRelationCountQueryForSelfJoin
Missing param in doc block.
Merge branch 'sync_return_changes_4.1' of https://github.com/arvidbjorkstrom/laravel-framework into arvidbjorkstrom-sync_return_changes_4.1
Working on formatting.
Merge branch 'patch-2' of https://github.com/chrispassas/framework into chrispassas-patch-2
Working on code.
Merging. Fix conflicts.