bozo: Fix memory leak, check for malloc failures

bozo: Fix memory leak, check for malloc failures

While reading the BosConfig file, the buffer obtained to hold the notp
(notify) parameter is never freed. Reading the BosConfig is only
done once at bosserver start up, so this is a one-time memory
allocation.

There are no checks for malloc failures.

Release the notp buffer and add checks for memory allocation errors.

Change-Id: Iffcb0db12f983a6a6d6a810a98be30152fa73c89
Reviewed-on: https://gerrit.openafs.org/14551
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Tested-by: Benjamin Kaduk <kaduk@mit.edu>