www: added privacy_intro config option

chatmaild/src/chatmaild/config.py

@@ -24,6 +24,7 @@ class Config:
         self.privacy_mail = params.get("privacy_mail")
         self.privacy_pdo = params.get("privacy_pdo")
         self.privacy_supervisor = params.get("privacy_supervisor")
+        self.privacy_intro = params.get("privacy_intro")
 
     def _getbytefile(self):
         return open(self._inipath, "rb")

chatmaild/src/chatmaild/ini/chatmail.ini.f

@@ -61,3 +61,4 @@ privacy_pdo =
 # postal address of the privacy supervisor
 privacy_supervisor =
 
+privacy_intro =

chatmaild/src/chatmaild/ini/override-testrun.ini

@@ -14,3 +14,7 @@ privacy_pdo =
 privacy_supervisor =
     State Commissioner for Data Protection and Freedom of Information of
     Baden-Württemberg in 70173 Stuttgart, Germany.
+privacy_intro =
+    This is the default onboarding server for Delta Chat.
+    If you don't choose to login to an existing email account,
+    you can get one on this server.