monitoring_log_requests: Improve data output

* Add environment var to enable/disable requests log
* Add ability to send data to an UDP listener instead of stdout

monitoring_log_requests/utils.py

@@ -0,0 +1,10 @@
+# Copyright 2020 Camptocamp SA
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html)
+
+from distutils.util import strtobool
+from os import environ
+
+
+def is_enabled():
+    env_val = environ.get('ODOO_REQUESTS_LOGGING')
+    return bool(strtobool(env_val or '0'.lower()))