Renaming 'socket' static function name to 'mymy_socket' to avoid conflict

- This is happend on FreeBSD 9.0
Merge pull request #9 from shigeya/rename_socket_func_to_avoid_conflict

Renaming 'socket' static function name to 'mymy_socket' to avoid conflict
Merge branch 'master' of github.com:oldmoe/mysqlplus into upstream