Do not use AFS_PTR_FMT or %p in 1.4

Do not use AFS_PTR_FMT or %p in 1.4

The afs_snprintf in the 1.4 series did not support %p, so don't use
it when logging fileserver messages.  Replace with 0x%lx and add a
cast to unsigned long, which should serve as an acceptible substitute.

Change-Id: I4b3ca260a35bb4e09bfbbe35bfe362ccd2b8eee9
Reviewed-on: http://gerrit.openafs.org/2128
Tested-by: Russ Allbery <rra@stanford.edu>
Reviewed-by: Simon Wilkinson <sxw@inf.ed.ac.uk>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit f9e1b702a3cd13066afd84e6745f95b4d1ababaa)