--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/krb_authentication/config.inc.php.dist	Thu Jan 04 15:50:29 2018 -0500
@@ -0,0 +1,13 @@
+<?php
+
+// Kerberos/GSSAPI Authentication Plugin options
+// ---------------------------------------------
+
+// Default mail host to log-in using user/password from HTTP Authentication.
+// This is useful if the users are free to choose arbitrary mail hosts (or
+// from a list), but have one host they usually want to log into.
+// Unlike $config['default_host'] this must be a string!
+$config['krb_authentication_host'] = '';
+
+// GSS API security context
+$config['krb_authentication_context'] = 'imap/kolab.example.org@EXAMPLE.ORG';