[httpupload] Use aegscm url scheme for omemo uploads

httpupload/httpupload.py

@@ -398,6 +398,7 @@ class Base(object):
             message = file.get
             if file.user_data:
                 message += '#' + file.user_data
+                message = self.convert_to_aegscm(message)
             else:
                 self.plugin.messages.append(message)
             file.control.send_message(message=message)
@@ -416,6 +417,10 @@ class Base(object):
         ErrorDialog(_('Error'), str(reason),
                     transient_for=file.control.parent_win.window)
 
+    @staticmethod
+    def convert_to_aegscm(url):
+        return 'aesgcm' + url[5:]
+
 
 class File:
     def __init__(self, path, **kwargs):