Add protocol configuration

Add a protocol configuration to the database connection string to allow for SSL connections using 'TCPS' protocol. [Source](http://docs.oracle.com/html/B10812_06/chapter5.htm)
please fix this line... should be like:
`$address .= '(ADDRESS = (PROTOCOL = '.$config["protocol"].')(HOST = '.trim($host[$i]).')(PORT = '.$config['port'].'))';`

Thanks!