Don't need to do anything else here for now.

Discussed with: @adschellevis

Not sure we'll ever hit this, make it more vague, although
IKE is pretty much either this or that.

Spotted by: @fabianfrz

Makes the file very light, best to be merged into misc settings.

Spotted by: @fabianfrz

(legacy) fix for crashreport ....failed to open stream: No such file or directory in /usr/local/www/guiconfig.inc on line 361

example:
	filename_[OPNsense.captiveportal.zones.zone.%.zoneid].conf

will result in file per config item, where zone is (optionally) repeating in config