mod_mam_archive: remove invalid disco#info feature The feature which was previously added to disco#info was in fact specified to be used for stream features only (see XEP-0136 section 11). Emitting it in disco#info is weird at best and breaks stuff at worst.

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summary: Store token events in the audit log
rockspec:
  dependencies:
  - mod_audit
...

This module stores events relating to auth tokens, e.g. grant creations and revokations, in the audit log provided by `mod_audit`.