mod_storage_sql: Change prosodyarchive_index to be non-unique (fixes #1087) MySQL requires that the first 20 bytes are unique, even if they differ after the first 20 bytes. This breaks e.g. pubsub/PEP nodes longer than 20 characters that have common prefixes.

For full information on our dependencies, version requirements, and
where to find them, see https://prosody.im/doc/depends

If you have luarocks available on your platform, install the following:

  - luaexpat
  - luasocket
  - luafilesystem
  - luasec