Rewrite X-IMAPbase: header before updating index file header, so that we write the latest mtime as sync_stamp.
Rewrite X-IMAPbase: header before updating index file header, so that we
write the latest mtime as sync_stamp.

Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot