feat: handles message parsing error & prints an error log

[bilthon]

Without this mostro just silently rejects malformed or out of date messages from clients without even an error log entry.

[arkanoider]

For me it's a merge without lookin, good to have more log on error in these case.

[bilthon]

Perhaps more could be done, like sending a CantDo message to the client. But logging it was the minimal thing I could think of and that as an operator can help you understand what happened and why the client's message got dropped.

[arkanoider]

Perhaps more could be done, like sending a CantDo message to the client. But logging it was the minimal thing I could think of and that as an operator can help you understand what happened and why the client's message got dropped.

I agree 100%

[grunch]

LGTM