mod_storage_sql: Add setting to tune SQLite3 performance vs safety
Notably the default journal_mode of DELETE is somewhat slow, some users
might want to catch up to the amazing performance of internal storage.
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