Merge branch 'adapt-old-config' into 'devel'

fix: resolve backward compability in config

See merge request oliver/ivatar!209

config.py

@@ -255,3 +255,18 @@ TRUSTED_DEFAULT_URLS = [
 # This MUST BE THE LAST!
 if os.path.isfile(os.path.join(BASE_DIR, "config_local.py")):
     from config_local import *  # noqa # flake8: noqa # NOQA # pragma: no cover
+
+def map_legacy_config(trusted_url):
+    """
+    For backward compability with the legacy configuration
+    for trusting URLs. Adapts them to fit the new config.
+    """
+    if isinstance(trusted_url, str):
+        return {
+            "url_prefix": trusted_url
+        }
+
+    return trusted_url
+
+# Backward compability for legacy behavior
+TRUSTED_DEFAULT_URLS = list(map(map_legacy_config, TRUSTED_DEFAULT_URLS))