When saving a mail with initial keywords, lock the uidlist before doing anything with the file's header.
When saving a mail with initial keywords, lock the uidlist before doing
anything with the file's header.

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