MINOR: proto_htx: Rely on the HTX function to apply a redirect rules

There is no reason to use the legacy HTTP version here, which falls back on the
HTX version in this case.
diff --git a/src/proto_htx.c b/src/proto_htx.c
index 2fd67f7..b08f999 100644
--- a/src/proto_htx.c
+++ b/src/proto_htx.c
@@ -3412,7 +3412,7 @@
 
 			case ACT_HTTP_REDIR:
 				rule_ret = HTTP_RULE_RES_DONE;
-				if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
+				if (!htx_apply_redirect_rule(rule->arg.redir, s, txn))
 					rule_ret = HTTP_RULE_RES_BADREQ;
 				goto end;