reverseproxy: Fix Caddyfile parsing for empty non-http transports (#3576)

* reverseproxy: Fix Caddyfile parsing for empty non-http transports

* Update modules/caddyhttp/reverseproxy/caddyfile.go

Co-authored-by: Matt Holt <mholt@users.noreply.github.com>

* Rename empty transport test

Co-authored-by: Matt Holt <mholt@users.noreply.github.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/caddytest/integration/caddyfile_adapt/reverse_proxy_empty_non_http_transport.txt b/caddytest/integration/caddyfile_adapt/reverse_proxy_empty_non_http_transport.txt
new file mode 100644
index 0000000..b261803
--- /dev/null
+++ b/caddytest/integration/caddyfile_adapt/reverse_proxy_empty_non_http_transport.txt
@@ -0,0 +1,36 @@
+:8884
+
+reverse_proxy 127.0.0.1:65535 {
+    transport fastcgi
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":8884"
+					],
+					"routes": [
+						{
+							"handle": [
+								{
+									"handler": "reverse_proxy",
+									"transport": {
+										"protocol": "fastcgi"
+									},
+									"upstreams": [
+										{
+											"dial": "127.0.0.1:65535"
+										}
+									]
+								}
+							]
+						}
+					]
+				}
+			}
+		}
+	}
+}