Fix panic on tcpdump being attached to interface being removed (introduced by r233937, pointed by hrs@ and adrian@)
Protect most of bpf_setf() by BPF global lock
Add several forgotten assertions (thanks to adrian@)
Document current locking model inside bpf.c
Document EVENTHANDLER(9) usage inside BPF.
Approved by: kib(mentor)
Tested by: gnn
MFC in: 4 weeks
man page after Orla, so the mistakes are probably mine. Leave a
note on the door welcoming the mdoc police.
Submitted by: Orla McGann <orly@cnri.dit.ie>
