plain and login auth

templates/conf.d/10-auth.conf.j2

@@ -97,7 +97,7 @@
 #   plain login digest-md5 cram-md5 ntlm rpa apop anonymous gssapi otp skey
 #   gss-spnego
 # NOTE: See also disable_plaintext_auth setting.
-auth_mechanisms = plain
+auth_mechanisms = plain login
 
 ##
 ## Password and user databases