Update some urls for email list signup

mythtv/README

@@ -60,18 +60,18 @@ keys.txt has a listing of all the various default key bindings.  All
 keybindings can be changed via MythWeb.
 
 If you want to check out the theme format, and perhaps make your own,
-look at http://www.mythtv.org/wiki/MythUI_Theme_Development and at the .xml files
+look at https://www.mythtv.org/wiki/MythUI_Theme_Development and at the .xml files
 in the /usr/local/share/mythtv/themes/[themename] subdirs.
 
 Feel free to subscribe to the development mailing list at:
-http://www.mythtv.org/mailman/listinfo/mythtv-dev
+http://lists.mythtv.org/mailman/listinfo/mythtv-dev
 
 A users list exists as well, subscribe at:
-http://www.mythtv.org/mailman/listinfo/mythtv-users
+http://lists.mythtv.org/mailman/listinfo/mythtv-users
 
 A list that's restricted to the Git commit and Trac (bug tracking) messages is
 available at:
-http://www.mythtv.org/mailman/listinfo/mythtv-commits
+http://lists.mythtv.org/mailman/listinfo/mythtv-commits
 
 To contact the developer's for corporate sponsorship, contract work or similarly
 formal and private matters please use the form at http://www.mythtv.org/contact/