example-config: Refer to ssl=required in disable_plaintext_auth setting.

example-config: Updated auth_username_format default to match reality.

example-config: Updated auth_krb5_keytab comment.

example-config: Updated auth_gssapi_hostname comment.

example-config: Moved disable_plaintext_auth to 10-auth.conf --HG-- branch : HEAD

auth: Added passdb static. --HG-- branch : HEAD

example-config: auth-checkpassword include wasn't listed in 10-auth.conf --HG-- branch : HEAD

example-config: Added nn- prefix to *.conf files so the sort ordering makes more sense. This is especially important to get mail_plugins = $mail_plugins example working in protocol sections. --HG-- branch : HEAD