Add script to validate all entries.html files

validate_html.sh

@@ -0,0 +1,10 @@
+#
+# check that all the html files are valid xml
+# sudo apt install libxml2-utils
+# no output = pass
+# zzz 1/23
+#
+for i in `find -name *.html`
+do
+	xmllint $i > /dev/null || echo "FAIL $i"
+done