Simple archiving program emulating functionality of Thunderbird on plain IMAP server.

All messages older than given number of days are moved to the corresponding archive folder in the year-rooted hierarchies. So, for example a message from Computer/python could get moved to Archive/2018/Computer/python.

All issues, questions, complaints, or (even better!) patches should be send via email to ~mcepl/devel@lists.sr.ht email list (for patches use git send-email).