Session cache interface redesign, Part 4:

Move provider-specific configuration handling down into the provider
code.  Eliminate all use of SSLModConfigRec within provider code.

* modules/ssl/ssl_private.h (modssl_sesscache_provider): Add 'create'
  function which creates and configures the cache provider, before
  initialisation.  Change 'init' function to take the context pointer
  as an input parameter, and reorder to be first.

* modules/ssl/ssl_scache.c (ssl_scache_init): Adjust accordingly.

* modules/ssl/ssl_scache_memcache.c (struct context): Add servers
  field.
  (ssl_scache_mc_create): New function.
  (ssl_scache_mc_init): Use servers from context not SSLModConfigRec.

* modules/ssl/ssl_scache_dbm.c (struct context): Define.
  (ssl_scache_dbm_create): New function.
  (ssl_scache_dbm_init, ssl_scache_dbm_kill): Adjust to use filename
  and pool from context.
  (ssl_scache_dbm_store, ssl_scache_dbm_retrieve,
  ssl_scache_dbm_status): Use filename from context.  Use context pool
  for temp storage of the DBM object, and clear before use.
  (ssl_scache_dbm_expire): Remove static tLast; use last_expiry from
  context.  Use context pool for temp storage and clear before use.

* modules/ssl/ssl_scache_dc.c (struct context): Add target field.
  (ssl_scache_dc_init, ssl_scache_dc_status): Use target from context.

* modules/ssl/ssl_scache_shmcb.c (struct context): Add data_file,
  shm_size fields.
  (ssl_scache_shmcb_create): New function; moved argument parsing
  logic from ssl_cmd_SSLSessionCache
  (ssl_scache_shmcb_init, ssl_scache_shmcb_status): Use config from
  context.

* modules/ssl/ssl_engine_config.c (ssl_config_global_create): Remove
  handling of old provider-specific fields.
  (ssl_cmd_SSLSessionCache): Call provider ->create function to parse
  the argument and create provider-specific context structure.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@630974 13f79535-47bb-0310-9956-ffa450edef68