vendor: github.com/docker/docker 2ed904cad7055847796433cc56ef1d1de0da868c

- replace deprecated types
- also fixing some minor nits

full diff: https://github.com/docker/docker/compare/8941dcfcc5db...2ed904cad7055847796433cc56ef1d1de0da868c

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/github.com/docker/docker/pkg/urlutil/urlutil.go

@@ -1,52 +0,0 @@
-// Package urlutil provides helper function to check urls kind.
-// It supports http urls, git urls and transport url (tcp://, …)
-package urlutil // import "github.com/docker/docker/pkg/urlutil"
-
-import (
-	"regexp"
-	"strings"
-)
-
-var (
-	validPrefixes = map[string][]string{
-		"url": {"http://", "https://"},
-
-		// The github.com/ prefix is a special case used to treat context-paths
-		// starting with `github.com` as a git URL if the given path does not
-		// exist locally. The "github.com/" prefix is kept for backward compatibility,
-		// and is a legacy feature.
-		//
-		// Going forward, no additional prefixes should be added, and users should
-		// be encouraged to use explicit URLs (https://github.com/user/repo.git) instead.
-		"git":       {"git://", "github.com/", "git@"},
-		"transport": {"tcp://", "tcp+tls://", "udp://", "unix://", "unixgram://"},
-	}
-	urlPathWithFragmentSuffix = regexp.MustCompile(".git(?:#.+)?$")
-)
-
-// IsURL returns true if the provided str is an HTTP(S) URL.
-func IsURL(str string) bool {
-	return checkURL(str, "url")
-}
-
-// IsGitURL returns true if the provided str is a git repository URL.
-func IsGitURL(str string) bool {
-	if IsURL(str) && urlPathWithFragmentSuffix.MatchString(str) {
-		return true
-	}
-	return checkURL(str, "git")
-}
-
-// IsTransportURL returns true if the provided str is a transport (tcp, tcp+tls, udp, unix) URL.
-func IsTransportURL(str string) bool {
-	return checkURL(str, "transport")
-}
-
-func checkURL(str, kind string) bool {
-	for _, prefix := range validPrefixes[kind] {
-		if strings.HasPrefix(str, prefix) {
-			return true
-		}
-	}
-	return false
-}