auth: OpenID/OAUth2 middleware

2 configurations for the listeners are now possible:
- enableJWT=false with client ssl auth
- enableJWT=true with https

Actual verification of the tokens is handled by
https://github.com/openshift-online/ocm-sdk-go.

An authentication handler is run as the top level handler, before any
routing is done. Routes which do not require authentication should be
listed as exceptions.

Authentication can be restricted using an ACL file which allows
filtering based on JWT claims. For more information see the inline
comments in ocm-sdk/authentication.

As an added quirk the `-v` flag for the osbuild-composer executable was
changed to `-verbose` to avoid flag collision with glog which declares
the `-v` flag in the package `init()` function. The ocm-sdk depends on
glog and pulls it in.

vendor/github.com/json-iterator/go/README.md

@@ -0,0 +1,87 @@
+[![Sourcegraph](https://sourcegraph.com/github.com/json-iterator/go/-/badge.svg)](https://sourcegraph.com/github.com/json-iterator/go?badge)
+[![GoDoc](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](https://pkg.go.dev/github.com/json-iterator/go)
+[![Build Status](https://travis-ci.org/json-iterator/go.svg?branch=master)](https://travis-ci.org/json-iterator/go)
+[![codecov](https://codecov.io/gh/json-iterator/go/branch/master/graph/badge.svg)](https://codecov.io/gh/json-iterator/go)
+[![rcard](https://goreportcard.com/badge/github.com/json-iterator/go)](https://goreportcard.com/report/github.com/json-iterator/go)
+[![License](http://img.shields.io/badge/license-mit-blue.svg?style=flat-square)](https://raw.githubusercontent.com/json-iterator/go/master/LICENSE)
+[![Gitter chat](https://badges.gitter.im/gitterHQ/gitter.png)](https://gitter.im/json-iterator/Lobby)
+
+A high-performance 100% compatible drop-in replacement of "encoding/json"
+
+You can also use thrift like JSON using [thrift-iterator](https://github.com/thrift-iterator/go)
+
+# Benchmark
+
+![benchmark](http://jsoniter.com/benchmarks/go-benchmark.png)
+
+Source code: https://github.com/json-iterator/go-benchmark/blob/master/src/github.com/json-iterator/go-benchmark/benchmark_medium_payload_test.go
+
+Raw Result (easyjson requires static code generation)
+
+|                 | ns/op       | allocation bytes | allocation times |
+| --------------- | ----------- | ---------------- | ---------------- |
+| std decode      | 35510 ns/op | 1960 B/op        | 99 allocs/op     |
+| easyjson decode | 8499 ns/op  | 160 B/op         | 4 allocs/op      |
+| jsoniter decode | 5623 ns/op  | 160 B/op         | 3 allocs/op      |
+| std encode      | 2213 ns/op  | 712 B/op         | 5 allocs/op      |
+| easyjson encode | 883 ns/op   | 576 B/op         | 3 allocs/op      |
+| jsoniter encode | 837 ns/op   | 384 B/op         | 4 allocs/op      |
+
+Always benchmark with your own workload.
+The result depends heavily on the data input.
+
+# Usage
+
+100% compatibility with standard lib
+
+Replace
+
+```go
+import "encoding/json"
+json.Marshal(&data)
+```
+
+with
+
+```go
+import jsoniter "github.com/json-iterator/go"
+
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
+json.Marshal(&data)
+```
+
+Replace
+
+```go
+import "encoding/json"
+json.Unmarshal(input, &data)
+```
+
+with
+
+```go
+import jsoniter "github.com/json-iterator/go"
+
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
+json.Unmarshal(input, &data)
+```
+
+[More documentation](http://jsoniter.com/migrate-from-go-std.html)
+
+# How to get
+
+```
+go get github.com/json-iterator/go
+```
+
+# Contribution Welcomed !
+
+Contributors
+
+- [thockin](https://github.com/thockin)
+- [mattn](https://github.com/mattn)
+- [cch123](https://github.com/cch123)
+- [Oleg Shaldybin](https://github.com/olegshaldybin)
+- [Jason Toffaletti](https://github.com/toffaletti)
+
+Report issue or pull request, or email taowen@gmail.com, or [![Gitter chat](https://badges.gitter.im/gitterHQ/gitter.png)](https://gitter.im/json-iterator/Lobby)