plugin account: print a warning and use "example.net" as default instead or raising an error when xmpp_domain is not set

src/plugins/plugin_misc_account.py

@@ -90,6 +90,8 @@ Salut à Toi association
 https://www.salut-a-toi.org
 """)
 
+DEFAULT_DOMAIN = u"example.net"
+
 
 class MiscAccount(object):
     """Account plugin: create a SàT + XMPP account, used by Libervia"""
@@ -279,7 +281,8 @@ class MiscAccount(object):
 
         domain = self.getConfig('new_account_domain') or self.getConfig('xmpp_domain', None)
         if not domain:
-            raise ValueError(_(u"xmpp_domain need to be set in sat.conf"))
+            log.warning(_(u'xmpp_domain needs to be set in sat.conf. Using "{default}" meanwhile').format(default=DEFAULT_DOMAIN))
+            return DEFAULT_DOMAIN
         return domain
 
     def _getAccountDialogUI(self, profile):