Typo correction in functions.php

Typo causes problem with mysql server info gathering when used remote database host. 

Debug info: HTTP/1.1 500 Internal Server Error Error (getDbInfo) Message: SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) Error (getDbInfo) getTraceAsString: #0 /usr/local/waf-fle/functions.php(3429): PDO->__construct('mysql:host=;dbn...', 'someuser', 'somepass') #1 /usr/local/waf-fle/dashboard/management.php(424): getDbInfo() #2 {main}