OPNSense/core 6151a8csrc/etc/inc interfaces.inc, src/etc/inc/plugins.inc.d openvpn.inc

interfaces: unwind the configuration a bit

Adapt newer code style techniques and try to separate convoluted
code into a clearer picture.  This makes pluggable interface code
more attractive as we do not have to know up front how the interface
will look like.
DeltaFile
+132-90src/etc/inc/interfaces.inc
+10-6src/etc/inc/plugins.inc.d/openvpn.inc
+142-962 files

UnifiedSplitRaw