vol: Log ignored dirs that look like partitions

vol: Log ignored dirs that look like partitions

If we see a /vicep*-like directory when we VAttachPartitions, and we
ignore it because it lacks an AlwaysAttach, log that we ignored it.
This may make things less confusing to admins that just try to create
a /vicep* directory and don't know why it doesn't work.

Feature suggested by Jason Edgecombe.

FIXES 128221

Reviewed-on: http://gerrit.openafs.org/2893
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
(cherry picked from commit 4803d50bdb8cdeae2c3f86b5c09e853573bc49eb)
Change-Id: I5d26d0b0edbd5eb11345c4be937d7ff986f46855
Reviewed-on: http://gerrit.openafs.org/3047
Tested-by: Derrick Brashear <shadow@dementia.org>