Remove proxy to changelogs.ubuntu.com

It was only ever enabled to allow us to use `do-release-upgrade` to
upgrade 20.04 to 22.04, we don't need it.

It is being crawled by bots, and generating a lot logs noise and
consuming diskspace (>50% of journald disk space).

Have left it commented out, as we may need to reenable if we have to
upgrade-in-place again.

Author: bloodearnest

changelogs.opensafely.org.conf.template …gs.opensafely.org.conf.template.disabledchangelogs.opensafely.org.conf.template renamed to changelogs.opensafely.org.conf.template.disabled changelogs.opensafely.org.conf.template renamed to changelogs.opensafely.org.conf.template.disabled

@@ -43,7 +43,7 @@ try() {
     curl_args+=(--write-out "%{http_code}")
     curl_args+=(--connect-to github-proxy.opensafely.org:80:127.0.0.1:8080)
     curl_args+=(--connect-to docker-proxy.opensafely.org:80:127.0.0.1:8080)
-    curl_args+=(--connect-to changelogs.opensafely.org:80:127.0.0.1:8080)
+    #curl_args+=(--connect-to changelogs.opensafely.org:80:127.0.0.1:8080)
 
     # Conditionally token if set. Only used for docker-proxy tests.
     if test -n "${token}"; then
@@ -187,6 +187,7 @@ try "docker-proxy.opensafely.org/v2/opensafely-core/busybox/blobs/$digest?" 200
 ### changelogs.opensafely.org ###
 
 # This allows us to use the do-release-upgrade tool to perform major backend OS upgrades.
-try changelogs.opensafely.org/meta-release-lts 200
+# Disabled as we don't typically needed unless we are using do-release-upgrade
+#try changelogs.opensafely.org/meta-release-lts 200
 
 exit $return_code