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

So some tests have been removed.
diff --git a/reg-tests/lua/b00001.vtc b/reg-tests/lua/b00001.vtc
index 4c39e95..588a5e3 100644
--- a/reg-tests/lua/b00001.vtc
+++ b/reg-tests/lua/b00001.vtc
@@ -49,6 +49,7 @@
 
     frontend f1
         mode http
+        ${no-htx} option http-use-htx
         bind "fd@${f1}"
         log ${Slog_addr}:${Slog_port} daemon
         log-format Ta=%Ta\ Tc=%Tc\ Td=%Td\ Th=%Th\ Ti=%Ti\ Tq=%Tq\ TR=%TR\ Tr=%Tr\ Tt=%Tt\ Tw=%Tw
@@ -56,6 +57,7 @@
 
     backend b1
         mode http
+        ${no-htx} option http-use-htx
         http-request use-service lua.foo.http
 
     frontend f2