avoid crash on spurious empty file in the pending_notifications dir #569
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I wanted to create
enforceE2EEincoming
for every maildir folder in/home/vmail/mail/DOMAIN/
I was not aware that there is apending_notifications
folder there, hard to realize when you have hundreds of folders there, it could happen to other people in general is better to be more resilient and just ignore such invalid files and delete them instead of crashing forever, dovecot process will fail badly then trying to connect to an nonexistent/run/chatmail-metadata/metadata.socket