This file documents the flow of control through the new LDAP logic: UserSearch | | SourceBlock *s; search in s->userDb / \ ----/ \----------- / \ not found found | / \ | / \ | LDAP user list | user user | / \ | | / \-------+ | timeout | | / | search LDAP ------------/ | URL list | / \ | / \ | not found | found | | | | return success \ / save both states in the userDb cache i.e. add to userDb if necessary | | return found state as success or failure