This is part of (TECH-1828).

rename timestamp function #917

Mix need to know if must not autostart Mnesia before ejabberd

Also make sure that configure without option does not force lager to false

Update translations

Update zh.po

Translated untranslated. Fixed fuzzy messages. Other fixes.

to be continued

Strip any pre-existing <x/> tags which have an <item/> child with a
'jid' attribute from MUC MAM messages.  This way, if such a tag exists,
clients can be sure it was added by mod_mam.

This mod_mam version doesn't store groupchat messages in user archives,
and it also doesn't support the "store_body_only" option.

* processone/pr/907:
  don't escape ERL_OPTIONS

ejabberd currently depends on Erlang/OTP 17.1 or higher, so we can now
use maps.