mod_proxy.xml: mention DNS caching when reusing backend connection
@@ -1079,7 +1079,10 @@ ProxyPass "/example" "http://backend.example.com" max=20 ttl=120 retry=300
httpd and
the backend server (regardless of protocol) tends to silently
drop connections or when backends themselves may be under round-
- robin DNS. To disable connection reuse,
+ robin DNS.
+ When connection reuse is enabled each backend domain is resolved
+ (with a DNS query) only once per child process and cached for all further
+ connections until the child is recycled. To disable connection reuse,
set this property value to <code>On</code>.
</td></tr>
<tr><td>enablereuse</td>
