mod_mam: On quota hit, separately delete by time and by item count This is to work around a possible SQL issue where offsets and time stamps don't interact correctly.

mod_storage_sql: Return cached count if only this is queried for

mod_storage_sql: Cache total count if it's calculated as part of the current query

mod_storage_sql: Skip cache write This would cause the cache to be wrong in case the the later INSERT fails and the transaction is aborted.

mod_storage_sql: Fix to use currently queried store Was using the previously queried store due to this being cached in an upvalue.

mod_storage_sql: Don't increment counter twice (fixes accounting error)

mod_storage_internal: Increase default quota to 10 000 Performance doesn't seem great but 10k should be far enough from limits inherited by the Lua parser. 1000 messages seemed pretty close to what an active user might produce in one week.

mod_storage_memory: Add support for archive item limits

mod_mam: Trim archive when quota has been exceeded

mod_storage_internal,_sql: Key item count cache on both username and store