/$config="\/usr\/sbin\/usermaint\/config\.conf";/,/[[:blank:]]*if (msqlSelectDB(\$/{
	N
	N
	c\
	require("/etc/usermaint/config.inc");\
	require("includes/system.inc.php");\
	require("/etc/usermaint/db.inc");
}


End line example:
        if (msqlSelectDB($sock, $db) < 0) {