Brought mod_auth_digest up to synch with 1.3, fixed ap_time_t-related

bugs, and changed shmem/locking to use apr API. Shared-mem is currently
disabled, however, because of problems with graceful restarts.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85341 13f79535-47bb-0310-9956-ffa450edef68