* Deprecate forwarding for invalid hop_start
* Add pre-hop packet drop policy
* Log ignored rebroadcasts for pre-hop packets
* Respect pre-hop policy ALLOW in routing gates
* Exempt local packets from pre-hop drop policy
* Format pre-hop log line
* Add MODERN_ONLY rebroadcast mode for pre-hop packets
* Simplify implementation for drop packet only behaviour
* Revert formatting-only changes
* Match ReliableRouter EOF formatting
* Make pre-hop drop a build-time flag
* Rework to compile/build flag MESHTASTIC_PREHOP_DROP
* Set MESHTASTIC_PREHOP_DROP off by default
* Inline pre-hop hop_start validity check
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Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
Co-authored-by: Jord <650645+DivineOmega@users.noreply.github.com>
Jord
