Regtest proxy_protocol_tlv_validation was added by commit
488ee7fb6e
("BUG/MAJOR: proxy_protocol: Properly validate TLV lengths") but it
relies on a trick involving http-after-response to append a header
after a 400-badreq response, which is not possible in earlier versions,
so make it depend on 2.2.
varnishtest "Check that the TLVs are properly validated"
+#REQUIRE_VERSION=2.2
+
feature ignore_unknown_macro
# We need one HAProxy for each test, because apparently the connection by