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.

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>
(cherry picked from commit 747a8c0642aeaef814d953d16968fb5026e1ec69)

Change-Id: Ib8944657b14e80b091f0b209dcf7e809c5fc0574
Reviewed-on: http://gerrit.openafs.org/4882
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementix.org>