viced: allow alternate addresses on the same hash chain again

viced: allow alternate addresses on the same hash chain again

Revert the logic meant to prevent duplicate entries in the
host address hash table so hosts with multiple addresses can
be stored in the same hash bucket again.

Add a new log message to show when the host cannot be stored
in the hash table because of an address-port pair collision
with a host already in the hash table.

Change-Id: I24bf48b912dcf3062201691b446372d78de9bc14
Reviewed-on: http://gerrit.openafs.org/1046
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>