pfsync: Remove deletion of states using the full pfsync_state struct

[vegeta_tuxpowered.net]

Summary

State deletions are sent over pfsync using struct pfsync_del_c. Remove the code for receiving state deletions using struct pfsync_state as such deletions are never sent. Rename functions and constants so that only the "compressed" versions remain.

Sponsored by: InnoGames GmbH

[vegeta_tuxpowered.net]

Remove support for printing the old state deletion messages from tcpdump.

[kp]

contrib/tcpdump/print-pfsync.c

120

I think we should keep this. tcpdump might have to look at (very) old pfsync traffic.

120

(Edit: Posted mostly to hear your thoughts. I can easily ignore this bit when I commit this, there's no need to update the review.)

[vegeta_tuxpowered.net]

Don't remove tcpdump compatibility.

[vegeta_tuxpowered.net]

contrib/tcpdump/print-pfsync.c

120

OK, let's keep then tcpdump compatibility.