vol: Fix logging functions

vol: Fix logging functions

Fix the Log, Abort and Quit functions used by the vol package so
that they are all defined in a common header file, rather than
prototyped in each file which uses them.

Use the appropriate macros to flag those functions which never
return, and mark them all as taking printf style input.

Fix all of the callers which had mismatched format strings and
arguments.

Change-Id: I78194f623360e13f055f8f37b3558c08a70acd1f
Reviewed-on: http://gerrit.openafs.org/2444
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>