Update terms (#925)

master -> main (where meaningful)

whitelist -> allowlist

exotic -> strange

Author: jonjohnsonjr

README.md

@@ -1,10 +1,10 @@
 # go-containerregistry
 
-[![Travis Build Status](https://travis-ci.org/google/go-containerregistry.svg?branch=master)](https://travis-ci.org/google/go-containerregistry)
+[![Travis Build Status](https://travis-ci.org/google/go-containerregistry.svg?branch=main)](https://travis-ci.org/google/go-containerregistry)
 [![GitHub Actions Build Status](https://github.com/google/go-containerregistry/workflows/Build/badge.svg)](https://github.com/google/go-containerregistry/actions?query=workflow%3ABuild)
 [![GoDoc](https://godoc.org/github.com/google/go-containerregistry?status.svg)](https://godoc.org/github.com/google/go-containerregistry)
 [![Go Report Card](https://goreportcard.com/badge/google/go-containerregistry)](https://goreportcard.com/report/google/go-containerregistry)
-[![Code Coverage](https://codecov.io/gh/google/go-containerregistry/branch/master/graph/badge.svg)](https://codecov.io/gh/google/go-containerregistry)
+[![Code Coverage](https://codecov.io/gh/google/go-containerregistry/branch/main/graph/badge.svg)](https://codecov.io/gh/google/go-containerregistry)
 
 
 ## Introduction

cmd/crane/README.md

@@ -51,7 +51,7 @@ docker-tag-latest:
   stage: latest
   only:
     refs:
-      - master
+      - main
   image:
     name: gcr.io/go-containerregistry/crane:debug
     entrypoint: [""]

images/dot/index-anatomy-exotic.dot images/dot/index-anatomy-strange.dot

@@ -46,11 +46,11 @@ e.g. to appease a registry with strict validation of images (_looking at you, GC
 
 Rebase has [its own README](/cmd/crane/rebase.md).
 
-This is the underlying implementation of [`crane rebase`](https://github.com/google/go-containerregistry/blob/master/cmd/crane/doc/crane_rebase.md).
+This is the underlying implementation of [`crane rebase`](https://github.com/google/go-containerregistry/blob/main/cmd/crane/doc/crane_rebase.md).
 
 ### `Extract`
 
 Extract will flatten an image filesystem into a single tar stream,
 respecting whiteout files.
 
-This is the underlying implementation of [`crane export`](https://github.com/google/go-containerregistry/blob/master/cmd/crane/doc/crane_export.md).
+This is the underlying implementation of [`crane export`](https://github.com/google/go-containerregistry/blob/main/cmd/crane/doc/crane_export.md).

images/index-anatomy-exotic.dot.svg images/index-anatomy-strange.dot.svg

@@ -76,7 +76,7 @@ which references an application/xml file from an image index.
 
 That could look something like this:
 
-![exotic image index anatomy](/images/index-anatomy-exotic.dot.svg)
+![strange image index anatomy](/images/index-anatomy-strange.dot.svg)
 
 Using a recursive index like this might not be possible with all registries,
 but this flexibility allows for some interesting applications, e.g. the
@@ -114,4 +114,4 @@ however, it's possible to do _something_ useful with them via [`remote.Get`](htt
 which doesn't try to interpret what is returned by the registry.
 
 [`crane.Copy`](https://godoc.org/github.com/google/go-containerregistry/pkg/crane#Copy) takes advantage of this to implement support for copying schema 1 images,
-see [here](https://github.com/google/go-containerregistry/blob/master/pkg/internal/legacy/copy.go).
+see [here](https://github.com/google/go-containerregistry/blob/main/pkg/internal/legacy/copy.go).

pkg/v1/mutate/README.md

@@ -26,7 +26,7 @@ import (
 // The set of query string keys that we expect to send as part of the registry
 // protocol. Anything else is potentially dangerous to leak, as it's probably
 // from a redirect. These redirects often included tokens or signed URLs.
-var paramWhitelist = map[string]struct{}{
+var paramAllowlist = map[string]struct{}{
 	// Token exchange
 	"scope":   {},
 	"service": {},
@@ -105,8 +105,8 @@ func redactURL(original *url.URL) *url.URL {
 	qs := original.Query()
 	for k, v := range qs {
 		for i := range v {
-			if _, ok := paramWhitelist[k]; !ok {
-				// key is not in the whitelist
+			if _, ok := paramAllowlist[k]; !ok {
+				// key is not in the Allowlist
 				v[i] = "REDACTED"
 			}
 		}