run 'go get -u; make revendor'

Signed-off-by: Stephan Renatus <srenatus@chef.io>

vendor/github.com/gorilla/handlers/compress.go

@@ -80,6 +80,7 @@ func CompressHandlerLevel(h http.Handler, level int) http.Handler {
 			switch strings.TrimSpace(enc) {
 			case "gzip":
 				w.Header().Set("Content-Encoding", "gzip")
+				r.Header.Del("Accept-Encoding")
 				w.Header().Add("Vary", "Accept-Encoding")
 
 				gw, _ := gzip.NewWriterLevel(w, level)
@@ -111,6 +112,7 @@ func CompressHandlerLevel(h http.Handler, level int) http.Handler {
 				break L
 			case "deflate":
 				w.Header().Set("Content-Encoding", "deflate")
+				r.Header.Del("Accept-Encoding")
 				w.Header().Add("Vary", "Accept-Encoding")
 
 				fw, _ := flate.NewWriter(w, level)