mod_ping: Use type-specific event
mod_storage_sql2: archive:delete() with username = true deletes for all users
mod_s2s: Log a warning if no local addresses are found, as this breaks s2sout
mod_admin_telnet: Prep jids for user:create() etc.
mod_saslauth: Make sure sasl handler has add_cb_handler (fixes #392)
Merge 0.9 -> 0.10
Merge 0.10 -> trunk