pagure: Log the auth related event to their own log file on disk

Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>

roles/pagure/frontend/templates/pagure.cfg

@@ -269,6 +269,15 @@ LOGGING = {
             'subject': 'ERROR on pagure.io',
             'filters': ['myfilter'],
         },
+        "auth_handler": {
+           "formatter": "standard",
+           "class": "logging.handlers.TimedRotatingFileHandler",
+           "filename": "/var/log/pagure/pagure_auth.log",
+           "backupCount": 10,
+           "utc": True,
+           "when": "midnight",
+       },
+
     },
     # The root logger configuration; this is a catch-all configuration
     # that applies to all log messages not handled by a different logger
@@ -282,6 +291,11 @@ LOGGING = {
             'level': 'DEBUG',
             'propagate': True
         },
+        "pagure_auth": {
+            "handlers": ["auth_handler"],
+            "level": "DEBUG",
+            "propagate": False,
+        },
         'flask': {
             'handlers': ['console'],
             'level': 'INFO',