imap: do not require TLS for connections to localhost
I use stunnel
to setup a TLS connection (as I had problems configuring client certs in evolution itself).
evolution then connects to ::1 (localhost), but still needs to provide a password.
With evolution 3.36.0-1 from Debian testing (bullseye), this stopped working and I get an error message:
The reported error was “Plaintext authentication disallowed on insecure connections.
Change encryption to STARTTLS or TLS for account “[...]”.”.
Please don't require TLS for connections to localhost (and ::1, 127.0.0.1 or 127.0.0.0/8).