Replace minio-go with aws-sdk-go for s3-compatible log backend (#670)

* Logs should support specifying region when using S3-compatible object store

* Use aws-sdk-go client for s3 backed logstore

* fixes vendor with aws-sdk-go dependencies

vendor/github.com/go-ini/ini/section.go

@@ -54,6 +54,14 @@ func (s *Section) Body() string {
 	return strings.TrimSpace(s.rawBody)
 }
 
+// SetBody updates body content only if section is raw.
+func (s *Section) SetBody(body string) {
+	if !s.isRawSection {
+		return
+	}
+	s.rawBody = body
+}
+
 // NewKey creates a new key to given section.
 func (s *Section) NewKey(name, val string) (*Key, error) {
 	if len(name) == 0 {
@@ -136,6 +144,7 @@ func (s *Section) HasKey(name string) bool {
 }
 
 // Haskey is a backwards-compatible name for HasKey.
+// TODO: delete me in v2
 func (s *Section) Haskey(name string) bool {
 	return s.HasKey(name)
 }