added jitsi settings to template and readme

SETTINGS.rst

@@ -66,6 +66,17 @@ To enable it, set::
     ENABLE_ELECTRONIC_VOTING = True
 
 
+Jitsi integration
+=================
+
+To enable the audio conference with Jitsi Meet, you have to set the following variables:
+
+- `JITSI_DOMAIN`: must contain an url to a Jitsi server
+- `JITSI_ROOM_NAME`: the name of the room that should be used
+- `JITSI_PASSWORD`: (optional) the password of the room. Will be
+applied automatically from the settings.
+
+
 Logging
 =======
 

openslides/utils/settings.py.tpl

@@ -133,6 +133,12 @@ if ENABLE_SAML:
 ENABLE_ELECTRONIC_VOTING = False
 
 
+# Jitsi integration
+# JITSI_DOMAIN = None
+# JITSI_ROOM_NAME = None
+# JITSI_PASSWORD = None
+
+
 # Internationalization
 # https://docs.djangoproject.com/en/1.10/topics/i18n/