firewall: alias nesting vs. geoip

[fichtner]

Adding a GeoIP alias "CH" and selecting "Switzerland" will make the alias fail to fetch any data.

This changed from 17.7 to 18.1 according to https://forum.opnsense.org/index.php?topic=7078.msg32856#msg32856

Do we add better validation or can we reenable this behaviour?

[AdSchellevis]

ok, this should work, cdae884 makes sure we don't skip resolving when the content equals our alias name.

Only downside is that when someone defines an alias "CH" with static content and has an alias containing both "CH" and "NL" the static alias is preferred.

[fichtner]

Works, static preference sounds good. ❤️