mod_mam_adhoc: Use ad-hoc command node suggested by XEP-0313

mod_limits: Import to prosody-modules, connection-level rate limiting

mod_archive: switch from/to The XEP-0136 is not very explicit about the meening of <from> and <to> elements, but the examples are clear: <from> means it comes from the user in the 'with' attribute of the collection. That is the opposite of what is currently implemented in that module. So for better compatibility with complient clients, this switch the 'from' and 'to' fields

mod_archive: Fix duplicate messages stored Message exchanged between users on the same server would be stored twice. This is because both the message hook and the pre-message hook would store for both users. The solution is to make sure the pre-message hook only store for the 'from' user, and the post message hook only store for the 'to' user.

mod_archive: Fix hour offset in stored message date os.date expect a timestamp in local time, that is subject to daylight saving. But since we pass an UTC timestamp to os.date one hour is (wrongly) added in the summer. The only sensible thing is to call the os.date only once with the ! parametter. And then parsing this sting to get the utc_timestamp. Calling os.date with an UTC timestamp is not possible, and calling os.date twice without timestamp could give different results.

mod_vjud: Don't break on undefined properties.

mod_vjud: Switch first and last name in results to be correct.

mod_vjud: Update util.vcard from verse

mod_compat_muc_admin: added missing import (thanke MattJ)

mod_vjud: Missing fields should not match everyone. (Thanks Pidgin)