chore(rest): /rest/system/debug is now loglevels (#950)

Author: calmh

rest/system-debug-get.rst

@@ -0,0 +1,25 @@
+GET /rest/system/loglevels
+==========================
+
+.. versionadded:: 2.0.0
+
+Returns the set of log facilities and their current log level.
+
+.. code-block:: json
+
+    {
+      "levels": {
+        "api": "INFO",
+        "beacon": "INFO",
+        ...
+        "versioner": "INFO",
+        "watchaggregator": "INFO"
+      },
+      "packages": {
+        "api": "REST API",
+        "beacon": "Multicast and broadcast discovery",
+        ...
+        "versioner": "File versioning",
+        "watchaggregator": "Filesystem event watcher"
+      }
+    }

rest/system-debug-post.rst

@@ -0,0 +1,12 @@
+POST /rest/system/loglevels
+===========================
+
+.. versionadded:: 2.0.0
+
+Changes the log level for specified facilities. Post an object with the log
+facilites as keys and desired log level (``DEBUG``, ``INFO``, ``WARN``, or
+``ERROR``) as the values.
+
+.. code-block:: bash
+
+    $ curl -H X-API-Key:abc123 -d '{"beacon":"DEBUG","discovery":"WARN"}' 'http://localhost:8384/rest/system/loglevels'