Restructured references section of the docs

docs/source/reference/api-reference/proxy.md

@@ -0,0 +1,21 @@
+# Proxies
+
+## Module: {mod}`jupyterhub.proxy`
+
+```{eval-rst}
+.. automodule:: jupyterhub.proxy
+```
+
+### {class}`Proxy`
+
+```{eval-rst}
+.. autoconfigurable:: Proxy
+   :members:
+```
+
+### {class}`ConfigurableHTTPProxy`
+
+```{eval-rst}
+.. autoconfigurable:: ConfigurableHTTPProxy
+   :members: debug, auth_token, check_running_interval, api_url, command
+```