Eliminate log.Println for in-memory store add, remove and timeout ops

[silviucm]

Hi @icza

Great package: clean, to the point, does what it advertises to be doing.

Quick question: only to avoid forking my own thing, would you consider making the log.Println operations optional for the in-memory store ?
https://github.com/icza/session/blob/master/inmem_store.go#L101
https://github.com/icza/session/blob/master/inmem_store.go#L129
https://github.com/icza/session/blob/master/inmem_store.go#L138

Maybe, to keep current logging for users that want it, have a boolean field DoNotLogEvents to the InMemStoreOptions struct and a private doNotLog to the inMemStore.
Those one could be set as needed when invoking: NewInMemStoreOptions
The log statements would be wrapped inside an if !s.doNotLog { log... }

Obviously, no pressure, I would be glad to send a pull request

Regards,
Silviu

[icza]

Hi @silviucm, this is reasonable, but I'd take a slightly different approach. Will solve this soon. Thanks for bringing this up.

[icza]

Done, see 5815dfd.

You may pass your custom log.Logger in InMemStoreOptions.Logger, or use session.NoopLogger to completely disable logging such events.