[Dovecot] imap can't reconnect to auth-master after setuid

[Mike Abbott]

With service imap { client_limit = 5, service_count = 0 }, when the auth process crashes the existing imap processes cannot reconnect to the auth-master socket because they have long ago dropped root privileges.  Is the right solution to this:
(1) change the perms on the auth-master socket so processes running as vmail:vmail can connect to it, or
(2) change the code so that multi-client imap processes stop accepting new clients when they notice an auth bounce?

If (1), the wiki should be updated to mention this.

Thanks.