v6 requires init.php instead of dbconnect.php
Contrib files updated with change from dbconnect.php to init.php for WHMCS v6
Ref: https://docs.whmcs.com/Version_6.0_Release_Notes#Removal_of_Dbconnect.php
Contrib files updated with change from dbconnect.php to init.php for WHMCS v6
Ref: https://docs.whmcs.com/Version_6.0_Release_Notes#Removal_of_Dbconnect.php