doc: refer to aklog instead of klog

doc: refer to aklog instead of klog

klog (and kaserver) is deprecated. In generic examples, refer to the Kerberos
5 equivalents.

Reviewed-on: http://gerrit.openafs.org/6721
Reviewed-by: Derrick Brashear <shadow@dementix.org>
Tested-by: Derrick Brashear <shadow@dementix.org>
(cherry picked from commit 07d9b18e36fff6fc96c629ac2bebe8bb43f6b9dd)

Change-Id: I3e00b5d6acbdae35ac9ea645f094ebe46d391776
Reviewed-on: http://gerrit.openafs.org/6758
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementix.org>