OPNSense/core adf314asrc/etc/inc interfaces.inc, src/opnsense/mvc/app/library/OPNsense/Firewall Plugin.php

interfaces: register em1_stf instead of wan_stf

Discussed with: @adschellevis
DeltaFile
+9-8src/opnsense/mvc/app/library/OPNsense/Firewall/Plugin.php
+6-6src/etc/inc/interfaces.inc
+15-142 files

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