Make ifconfig do something intelligent based on the required length of

Make ifconfig do something intelligent based on the required length of
WEP keys rather then being silently dumb, so when using WEP:
1) If the key is a plausible size try to use it.
2) If they key would be a plausible size with '0x' in front of it, add that.
3) If the key is not a plausible size, emit a warning and do not try to use it.
ok sthen@