#93 Errors via mail

* configures server errors sending via mail
   * default for now is always 'ksp-servicestelle'
* includes improvements from #97

konova/utils/mailer.py

@@ -5,16 +5,12 @@ Contact: michel.peltriaux@sgdnord.rlp.de
 Created on: 09.11.20
 
 """
-import logging
-
 from django.core.mail import send_mail
 from django.template.loader import render_to_string
 from django.utils.translation import gettext_lazy as _
 
 from konova.sub_settings.django_settings import DEFAULT_FROM_EMAIL, EMAIL_REPLY_TO, SUPPORT_MAIL_RECIPIENT
 
-logger = logging.getLogger(__name__)
-
 
 class Mailer:
     """