REGTEST: make ssl_client_samples and ssl_server_samples requiret to 2.3
These ones added new sample fetches that are only available in 2.3 and
which fail on older versions.
diff --git a/reg-tests/ssl/ssl_client_samples.vtc b/reg-tests/ssl/ssl_client_samples.vtc
index c23d182..54212b2 100644
--- a/reg-tests/ssl/ssl_client_samples.vtc
+++ b/reg-tests/ssl/ssl_client_samples.vtc
@@ -1,7 +1,7 @@
#REGTEST_TYPE=devel
varnishtest "Test the ssl_c_* sample fetches"
-#REQUIRE_VERSION=1.6
+#REQUIRE_VERSION=2.3
#REQUIRE_OPTIONS=OPENSSL
feature ignore_unknown_macro