Fix no-ip.com credential exposure

When using the DNS updater no-ip.com credentials are exposed due to the
use of http.
Switching to https fixes the vulnerability.

Author: iamezaga

plugins/no_ip.py

@@ -25,7 +25,7 @@ class NoAddressPlugin(ServicePlugin):
 
     _name = 'no-ip.com'
     _oneliner = 'Updates on http://no-ip.com/'
-    _url = "http://dynupdate.no-ip.com/nic/update?hostname={0}"
+    _url = "https://dynupdate.no-ip.com/nic/update?hostname={0}"
 
     def register(self, log, hostname, ip, options):
         """Implement ServicePlugin.register()."""