doc: fix the salvageserver log file name

doc: fix the salvageserver log file name

Fix capitialization of the salvageserver log file name.

Reviewed-on: http://gerrit.openafs.org/11728
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Chas Williams <3chas3@gmail.com>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
(cherry picked from commit ef435746d04845753477af8b7d920d66e9dce54f)

Change-Id: Iff597d46f9915d2a0c089ac2c8ec66d9ba039344
Reviewed-on: http://gerrit.openafs.org/12100
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Mark Vitale <mvitale@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>