Add getmail configuration option read_all
It would be great and useful for migrating mail accounts to allow fetching of read messages from a remote mail server through getmail. This can be done by adding the read_all option in the configuration file and remove the '-n' option from the run-getmail.sh script.
I already prepared a big patch which includes this functionality (against trunk). So a quick review should be all that is needed for this to rollout :)