added privacy_list_data index for mysql database.
improve error handling when sql calling with (empty|unknown) host.
see #191
fix mod_offline:count_offline_messages/2
Merge pull request #200 from hamano/mod_offline_bug

fix mod_offline:count_offline_messages/2
Webadmin with extauth requires internal to run at least once (issue #201)
Merge pull request #180 from hamano/mysql_table

added privacy_list_data index for mysql database.
Merge pull request #203 from hamano/added_get_random_pid_error_handling

improve error handling when sql calling with (empty|unknown) host.