brian 146874eeb6 Return 0 and do nothing when we get a SIOCSIFFLAGS.
Without this, ifpromisc() always fails (after setting the IFF_PROMISC
bit in ifp->if_flags) and bpf never bothers to turn promiscuous mode off.

PR:	20188
2001-04-02 21:49:18 +00:00
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