REGTEST: http-rules: Require PCRE or PCRE2 option to run map_redirect script

Only PCRE was specified as required option to execute this script. But PCRE2 is
an valid alternative.
diff --git a/reg-tests/http-rules/map_redirect.vtc b/reg-tests/http-rules/map_redirect.vtc
index 57f83dc..9951291 100644
--- a/reg-tests/http-rules/map_redirect.vtc
+++ b/reg-tests/http-rules/map_redirect.vtc
@@ -1,5 +1,5 @@
 varnishtest "haproxy host header: map / redirect tests"
-#REQUIRE_OPTIONS=PCRE
+#REQUIRE_OPTIONS=PCRE|PCRE2
 feature ignore_unknown_macro
 
 #REQUIRE_VERSION=1.6