Update aws-sdk to 1.42.27

Upgrade the aws golang SDK to 1.42.27 to add the new options for
configuring S3 dualstack endpoints.

Signed-off-by: Adam Kaplan <adam.kaplan@redhat.com>

vendor/github.com/aws/aws-sdk-go/private/protocol/timestamp.go

@@ -1,6 +1,8 @@
 package protocol
 
 import (
+	"bytes"
+	"fmt"
 	"math"
 	"strconv"
 	"time"
@@ -19,15 +21,18 @@ const (
 // Output time is intended to not contain decimals
 const (
 	// RFC 7231#section-7.1.1.1 timetamp format. e.g Tue, 29 Apr 2014 18:30:38 GMT
-	RFC822TimeFormat = "Mon, 2 Jan 2006 15:04:05 GMT"
+	RFC822TimeFormat                           = "Mon, 2 Jan 2006 15:04:05 GMT"
+	rfc822TimeFormatSingleDigitDay             = "Mon, _2 Jan 2006 15:04:05 GMT"
+	rfc822TimeFormatSingleDigitDayTwoDigitYear = "Mon, _2 Jan 06 15:04:05 GMT"
 
 	// This format is used for output time without seconds precision
 	RFC822OutputTimeFormat = "Mon, 02 Jan 2006 15:04:05 GMT"
 
 	// RFC3339 a subset of the ISO8601 timestamp format. e.g 2014-04-29T18:30:38Z
-	ISO8601TimeFormat = "2006-01-02T15:04:05.999999999Z"
+	ISO8601TimeFormat    = "2006-01-02T15:04:05.999999999Z"
+	iso8601TimeFormatNoZ = "2006-01-02T15:04:05.999999999"
 
-	// This format is used for output time without seconds precision
+	// This format is used for output time with fractional second precision up to milliseconds
 	ISO8601OutputTimeFormat = "2006-01-02T15:04:05.999999999Z"
 )
 
@@ -48,7 +53,7 @@ func IsKnownTimestampFormat(name string) bool {
 
 // FormatTime returns a string value of the time.
 func FormatTime(name string, t time.Time) string {
-	t = t.UTC()
+	t = t.UTC().Truncate(time.Millisecond)
 
 	switch name {
 	case RFC822TimeFormatName:
@@ -67,10 +72,21 @@ func FormatTime(name string, t time.Time) string {
 // the time if it was able to be parsed, and fails otherwise.
 func ParseTime(formatName, value string) (time.Time, error) {
 	switch formatName {
-	case RFC822TimeFormatName:
-		return time.Parse(RFC822TimeFormat, value)
-	case ISO8601TimeFormatName:
-		return time.Parse(ISO8601TimeFormat, value)
+	case RFC822TimeFormatName: // Smithy HTTPDate format
+		return tryParse(value,
+			RFC822TimeFormat,
+			rfc822TimeFormatSingleDigitDay,
+			rfc822TimeFormatSingleDigitDayTwoDigitYear,
+			time.RFC850,
+			time.ANSIC,
+		)
+	case ISO8601TimeFormatName: // Smithy DateTime format
+		return tryParse(value,
+			ISO8601TimeFormat,
+			iso8601TimeFormatNoZ,
+			time.RFC3339Nano,
+			time.RFC3339,
+		)
 	case UnixTimeFormatName:
 		v, err := strconv.ParseFloat(value, 64)
 		_, dec := math.Modf(v)
@@ -83,3 +99,36 @@ func ParseTime(formatName, value string) (time.Time, error) {
 		panic("unknown timestamp format name, " + formatName)
 	}
 }
+
+func tryParse(v string, formats ...string) (time.Time, error) {
+	var errs parseErrors
+	for _, f := range formats {
+		t, err := time.Parse(f, v)
+		if err != nil {
+			errs = append(errs, parseError{
+				Format: f,
+				Err:    err,
+			})
+			continue
+		}
+		return t, nil
+	}
+
+	return time.Time{}, fmt.Errorf("unable to parse time string, %v", errs)
+}
+
+type parseErrors []parseError
+
+func (es parseErrors) Error() string {
+	var s bytes.Buffer
+	for _, e := range es {
+		fmt.Fprintf(&s, "\n * %q: %v", e.Format, e.Err)
+	}
+
+	return "parse errors:" + s.String()
+}
+
+type parseError struct {
+	Format string
+	Err    error
+}