Fix a bug introduced in the previous commit in ejabberd_sql_pt

Prepare mix for 17.09

Temporary remove recent last_item refactor

Close accepted socket if sockname/peername has failed

Fixes processone#1834

Fix invalid argument in get_messages_susbset

This should fix processone#1818

Prepare package for 17.06-beta

Rename aux.erl as misc.erl

Thanks Microsoft Windows to not support some filenames

Avoid PID collisions

Fixes processone#1470

Fix a case clause and run c2s_filter_send on send_error/3

Prepare 17.01 for hex.pm