Remove shmht session cache in favour of shmcb; shmht has had

Remove shmht session cache in favour of shmcb; shmht has had
data corruption bugs since being apr_rmm'ified.

* config.m4, mod_ssl.dsp: Don't build ssl_util_table and
ssl_scache_shmht.

* ssl_util_table.h, ssl_util_table.c, ssl_scache_shmht.c: Removed
files.

* mod_ssl.h (SSLModConfigRec): Use a void * pointer for storing
the scache-specific data.

* ssl_engine_config.c (ssl_cmd_SSLSessionCache): Treat shmht: as
shmcb:.

* ssl_scache.c: Remove shmht hooks throughout.

* ssl_scache_shmcb.c: Remove casts to use the table_t * pointer as a
void *.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk/modules/ssl@101888 13f79535-47bb-0310-9956-ffa450edef68