adjust syntax in fastcgi test; add another test for the old syntax

regress/regress

@@ -51,6 +51,7 @@ run_test test_require_client_ca
 run_test test_root_inside_location
 run_test test_root_inside_location_with_redirect
 run_test test_fastcgi
+run_test test_fastcgi_deprecated_syntax
 run_test test_macro_expansion
 run_test test_proxy_relay_to
 run_test test_proxy_with_certs

regress/tests.sh

@@ -218,7 +218,7 @@ test_fastcgi() {
 	./fcgi-test fcgi.sock &
 	fcgi_pid=$!
 
-	setup_simple_test 'prefork 1' 'fastcgi "'$PWD'/fcgi.sock"'
+	setup_simple_test 'prefork 1' 'fastcgi socket "'$PWD'/fcgi.sock"'
 
 	msg=$(printf "# hello from fastcgi!\nsome more content in the page...")
 
@@ -238,6 +238,26 @@ test_fastcgi() {
 	return 0
 }
 
+test_fastcgi_deprecated_syntax() {
+	./fcgi-test fcgi.sock &
+	fcgi_pid=$!
+
+	# the old syntax will eventually go away, but check that the
+	# backward compatibility works.
+	setup_simple_test 'prefork 1' 'fastcgi "'$PWD'/fcgi.sock"'
+
+	msg=$(printf "# hello from fastcgi!\nsome more content in the page...")
+	fetch /
+	check_reply "20 text/gemini" "$msg"
+	if [ $? -ne 0 ]; then
+		kill $fcgi_pid
+		return 1
+	fi
+
+	kill $fcgi_pid
+	return 0
+}
+
 test_macro_expansion() {
 	cat <<EOF > reg.conf
 pwd = "$PWD"