Created more BMO hooks to replace legacy functions.
doDestinationsHook() {} to replace $mod_destinations()
doCheckDestinationsHook() {} to replace $mod_check_destinations()
doDestInfoHook() {} to replace $mod_getdestinfo()
doChangeDestinationHook() {} to replace $mod_change_destination()
Will push PRs tonight along with the updated doCheckExtensionsHook() PR.