yamt 28b17ac69e in_control: fix address leaks on error, which causes a panic
("no domain for AF 0") on if_detach.
- SIOCAIFADDR, SIOCSIFADDR: free an address on error.
- SIOCSIFNETMASK, SIOCSIFDSTADDR: reject operations for an interface which
  has no AF_INET addresses.

partly from OpenBSD and FreeBSD.
reviewed by Christos Zoulas on tech-net@.
2004-08-08 09:52:41 +00:00
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