aklog: Dispose of the pointless confname string

aklog: Dispose of the pointless confname string

confname makes a static copy of the AFSDIR_CLIENT_ETC_DIRPATH string. As
pr_Initialize takes it as const, there's no need to maintain our own
copy, and so this is superfluous. Remove it.

Change-Id: I64b13aae80b15f6b7511a040f39467bca76186b8
Reviewed-on: http://gerrit.openafs.org/1322
Reviewed-by: Alistair Ferguson <alistair.ferguson@mac.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>