REGTEST: Add option to use HTX prefixed by the macro 'no-htx'

So some tests have been removed.
diff --git a/reg-tests/stick-table/b00000.vtc b/reg-tests/stick-table/b00000.vtc
index 1071bc0..5885193 100644
--- a/reg-tests/stick-table/b00000.vtc
+++ b/reg-tests/stick-table/b00000.vtc
@@ -16,6 +16,7 @@
 
 	frontend test
 		mode http
+		${no-htx} option http-use-htx
 		bind "fd@${fe1}"
 		stick-table type ip size 1m expire 1h store gpc0
 		http-request deny if { src,table_trackers(test) eq 1 }