• Reduce memory use significantly. The "last position of all stations"

cache was unnecessarily holding a copy of the last packet from each
station, eating 248 bytes per station (or more, if it was a long packet).
It wasn't used for anything, so I removed the packet data from the
structure, and it now uses 56 bytes per station. From about 13 megabytes
to about 3 megabytes on a normal day.

PR: ports/253296
Submitted by: freebsd-ports@dan.me.uk
Reviewed by: portmgr
Approved by: Maintainer