Vendor distribution changes

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)

hack/vendor.sh

@@ -87,7 +87,7 @@ clone git github.com/boltdb/bolt v1.2.1
 clone git github.com/miekg/dns 75e6e86cc601825c5dbcd4e0c209eab180997cd7
 
 # get graph and distribution packages
-clone git github.com/docker/distribution 4e17ab5d319ac5b70b2769442947567a83386fbc
+clone git github.com/docker/distribution 07f32ac1831ed0fc71960b7da5d6bb83cb6881b5
 clone git github.com/vbatts/tar-split v0.9.11
 
 # get go-zfs packages

vendor/src/github.com/docker/distribution/registry/client/auth/session.go

@@ -72,15 +72,19 @@ type endpointAuthorizer struct {
 }
 
 func (ea *endpointAuthorizer) ModifyRequest(req *http.Request) error {
-	v2Root := strings.Index(req.URL.Path, "/v2/")
-	if v2Root == -1 {
+	pingPath := req.URL.Path
+	if v2Root := strings.Index(req.URL.Path, "/v2/"); v2Root != -1 {
+		pingPath = pingPath[:v2Root+4]
+	} else if v1Root := strings.Index(req.URL.Path, "/v1/"); v1Root != -1 {
+		pingPath = pingPath[:v1Root] + "/v2/"
+	} else {
 		return nil
 	}
 
 	ping := url.URL{
 		Host:   req.URL.Host,
 		Scheme: req.URL.Scheme,
-		Path:   req.URL.Path[:v2Root+4],
+		Path:   pingPath,
 	}
 
 	challenges, err := ea.challenges.GetChallenges(ping)
@@ -151,6 +155,19 @@ func (rs RepositoryScope) String() string {
 	return fmt.Sprintf("repository:%s:%s", rs.Repository, strings.Join(rs.Actions, ","))
 }
 
+// RegistryScope represents a token scope for access
+// to resources in the registry.
+type RegistryScope struct {
+	Name    string
+	Actions []string
+}
+
+// String returns the string representation of the user
+// using the scope grammar
+func (rs RegistryScope) String() string {
+	return fmt.Sprintf("registry:%s:%s", rs.Name, strings.Join(rs.Actions, ","))
+}
+
 // TokenHandlerOptions is used to configure a new token handler
 type TokenHandlerOptions struct {
 	Transport   http.RoundTripper