added CAMEL_PROVIDER_CONF_HIDDEN to conf item type enum. This is used by

added CAMEL_PROVIDER_CONF_HIDDEN to conf item type enum. This is used by

2004-05-24  Sivaiah Nallagatla <snallagatla@novell.com>

        * camel-provider.h : added CAMEL_PROVIDER_CONF_HIDDEN to
         conf item type enum. This is used by groupwise provider
        * providers/groupwise/camel-groupwise-provider.c : Added CAMEL_PROVIDER_CONF_HIDDEN
        to groupwise_conf_entries to pass the auth-domain value
        * providers/imap/camel-imap-store.c (imap_auth_loop) : read the auth-domain
        property from imap url and pass it camel sesstion apis