mod_http_oauth2: Record OAuth software id and version attached to tokens Unsure if these are used anywhere, but `software_id` is supposedly more unique than `client_uri` which can vary by registration or something? Software versions can also be good to know e.g. in case there is a security issue affecting certain versions that could warrant revocation of tokens issued to it.

This module writes out a traceback to `traceback.txt` in Prosodys data
directory (see `prosodyctl about`) when the signal `SIGUSR1` is
received. This is useful when debugging seemingly frozen instances in
case it is stuck in Lua code.