maildir: When logging "scanning took n secs" warning, log also why scan was done. This could help debugging why cur/ directory is sometimes scanned with maildir_very_dirty_syncs=yes (if the previous commit didn't fully solve it).
maildir: When logging "scanning took n secs" warning, log also why scan was done.
This could help debugging why cur/ directory is sometimes scanned with
maildir_very_dirty_syncs=yes (if the previous commit didn't fully solve it).

dscho/dovecot,dscho/dovecot,dscho/dovecot,dscho/dovecot,dscho/dovecot