Add script to compare results with cache

etc/fetch-compare-known.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+cat <<EOF
+Dry-running fetch script
+
+EOF
+/bin/php php/fetch-servers.php --verbose --dry-run > log.txt 2>&1;
+cat <<EOF
+Grep of log for each known server URL:
+
+EOF
+for url in $(jq -r 'map(.base_url) | .[] | ltrimstr("http://") | ltrimstr("https://")' cache/rooms.json); do
+    echo "Results for $url:";
+    echo;
+    grep "$url" log.txt;
+    echo ">";
+    read -r;
+done