Shutdown IMAP connection when done with it.

fanficfare/geturls.py

@@ -193,6 +193,7 @@ def get_urls_from_imap(srv,user,passwd,folder,markread=True,normalize_urls=False
 
     # logger.debug("get_urls_from_imap srv:(%s)"%srv)
     mail = imaplib.IMAP4_SSL(srv)
+    try:
         status = mail.login(user, passwd)
         if status[0] != 'OK':
             raise FetchEmailFailed("Failed to login to mail server")
@@ -277,6 +278,8 @@ def get_urls_from_imap(srv,user,passwd,folder,markread=True,normalize_urls=False
             [ urls.add(x) for x in urllist ]
 
         return urls
+    finally:
+        mail.shutdown()
 
 # used by drag-n-drop of email from thunderbird onto Calibre.
 def get_urls_from_mime(mime_data):