bpf does not check PRIV_NET_SETIFFLAGS to set promisc

Hi,

replying to a question on the tcpdump ML, I just realized that we allow users 
who have permissions on bpf to bypass PRIV_NET_SETIFFLAGS for setting 
promiscuous mode.  This certainly is not a security problem per se - as bpf 
access is a mighty permission on its own and shouldn't be given out to 
untrusted users ... so this is just an "is this intended?" type of thing.

BTW, I strongly vote for keeping the possibility to use bpf (in promisc mode) 
for non-root users.

-- 
/"\  Best regards,                      | mlaier_at_freebsd.org
\ /  Max Laier                          | ICQ #67774661
 X   http://pf4freebsd.love2party.net/  | mlaier_at_EFnet
/ \  ASCII Ribbon Campaign              | Against HTML Mail and News