Vendor update for aws sdk

Updated to latest version of go aws sdk.
Use vendored sub pakages within aws sdk.
Adds missing vendor packages for letsencrypt

Fixes #1832

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

vendor/github.com/aws/aws-sdk-go/service/cloudfront/sign/policy.go

@@ -13,6 +13,7 @@ import (
 	"net/url"
 	"strings"
 	"time"
+	"unicode"
 )
 
 // An AWSEpochTime wraps a time value providing JSON serialization needed for
@@ -110,6 +111,12 @@ func (p *Policy) Validate() error {
 		if s.Resource == "" {
 			return fmt.Errorf("statement at index %d does not have a resource", i)
 		}
+		if !isASCII(s.Resource) {
+			return fmt.Errorf("unable to sign resource, [%s]. "+
+				"Resources must only contain ascii characters. "+
+				"Hostnames with unicode should be encoded as Punycode, (e.g. golang.org/x/net/idna), "+
+				"and URL unicode path/query characters should be escaped.", s.Resource)
+		}
 	}
 
 	return nil
@@ -120,7 +127,7 @@ func (p *Policy) Validate() error {
 func CreateResource(scheme, u string) (string, error) {
 	scheme = strings.ToLower(scheme)
 
-	if scheme == "http" || scheme == "https" {
+	if scheme == "http" || scheme == "https" || scheme == "http*" || scheme == "*" {
 		return u, nil
 	}
 
@@ -208,3 +215,12 @@ func awsEscapeEncoded(b []byte) {
 		}
 	}
 }
+
+func isASCII(u string) bool {
+	for _, c := range u {
+		if c > unicode.MaxASCII {
+			return false
+		}
+	}
+	return true
+}