While reading PR 62422 I noticed that ProxySet's available
contextes list only 'directory', that looks odd:
AP_INIT_RAW_ARGS("ProxySet", set_proxy_param, NULL, RSRC_CONF|ACCESS_CONF
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@
1834524 13f79535-47bb-0310-9956-
ffa450edef68
<name>ProxySet</name>
<description>Set various Proxy balancer or member parameters</description>
<syntax>ProxySet <var>url</var> <var>key=value [key=value ...]</var></syntax>
-<contextlist><context>directory</context>
+<contextlist><context>server config</context><context>virtual host</context>
+<context>directory</context>
</contextlist>
<compatibility>ProxySet is only available in Apache HTTP Server 2.2
and later.</compatibility>