Disconnect and logout from IMAP after mail receive (#14103).

Patch by Pierre Pretorius.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11905 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/imap.rb

@@ -48,6 +48,8 @@ module Redmine
           end
         end
         imap.expunge
+        imap.logout
+        imap.disconnect
       end
 
       private