Pass args to .mysqlConnect

[phil294]

It would be nice to be able to pass host, username etc. directly with the mysql-scratchpad.mysqlConnect command.

In keybindings.json, this could look like the following:

	{
		"key": "...",
		"command": "mysql-scratchpad.mysqlConnect",
		"args": {
			"host": "123.456.678.123",
			"user": "user",
			"password": "pass",
			"port": "123",
			"database": "db"
		}
	}

While #4 suggests a graphical implementation, this small change would allow the user to automate the connection.
Thanks for this awesome extension.