Use vendored go-swagger (#8087)

* Use vendored go-swagger

* vendor go-swagger

* revert un wanteed change

* remove un-needed GO111MODULE

* Update Makefile

Co-Authored-By: techknowlogick <matti@mdranta.net>

vendor/github.com/go-openapi/swag/net.go

@@ -0,0 +1,38 @@
+// Copyright 2015 go-swagger maintainers
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package swag
+
+import (
+	"net"
+	"strconv"
+)
+
+// SplitHostPort splits a network address into a host and a port.
+// The port is -1 when there is no port to be found
+func SplitHostPort(addr string) (host string, port int, err error) {
+	h, p, err := net.SplitHostPort(addr)
+	if err != nil {
+		return "", -1, err
+	}
+	if p == "" {
+		return "", -1, &net.AddrError{Err: "missing port in address", Addr: addr}
+	}
+
+	pi, err := strconv.Atoi(p)
+	if err != nil {
+		return "", -1, err
+	}
+	return h, pi, nil
+}