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/internal/ini/literal_tokens.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"strconv"
 	"strings"
+	"unicode"
 )
 
 var (
@@ -18,7 +19,7 @@ var literalValues = [][]rune{
 
 func isBoolValue(b []rune) bool {
 	for _, lv := range literalValues {
-		if isLitValue(lv, b) {
+		if isCaselessLitValue(lv, b) {
 			return true
 		}
 	}
@@ -39,6 +40,21 @@ func isLitValue(want, have []rune) bool {
 	return true
 }
 
+// isCaselessLitValue is a caseless value comparison, assumes want is already lower-cased for efficiency.
+func isCaselessLitValue(want, have []rune) bool {
+	if len(have) < len(want) {
+		return false
+	}
+
+	for i := 0; i < len(want); i++ {
+		if want[i] != unicode.ToLower(have[i]) {
+			return false
+		}
+	}
+
+	return true
+}
+
 // isNumberValue will return whether not the leading characters in
 // a byte slice is a number. A number is delimited by whitespace or
 // the newline token.
@@ -177,7 +193,7 @@ func newValue(t ValueType, base int, raw []rune) (Value, error) {
 	case QuotedStringType:
 		v.str = string(raw[1 : len(raw)-1])
 	case BoolType:
-		v.boolean = runeCompare(v.raw, runesTrue)
+		v.boolean = isCaselessLitValue(runesTrue, v.raw)
 	}
 
 	// issue 2253