* Extended set_config()
* Implemented get_config() which takes over $CFG loading in setup.php
* admin/auth.php has special handling if post vars starting in pluginconfig_
* admin/auth.php print_auth_lock_options() prints a form fragment -- being called from most plugins now
* user/edit.php follows the new convention when locking down fields, both javascript UI and on POST.
* admin/auth: More solid checking for auth GET/POST var.
* admin/auth: print_auth_lock_options() now handles user field mapping options for LDAP and similar modules
* admin/auth: user mapping options have moved to config_plugins table
* auth/ldap module has migrated to using new field mapping vars -- simplified config.html a lot
* auth settings migration to config_plugins
