Update vendor directory

vendor/github.com/ncw/swift/expect_continue.go

@@ -0,0 +1,22 @@
+// Show that we can use `Expect: 100-continue` in go versions >= 1.6
+//
+// +build go1.6
+
+package swift
+
+import (
+	"net/http"
+	"time"
+)
+
+// DisableExpectContinue indicates whether this version of go supports
+// expect continue.
+const DisableExpectContinue = false
+
+// SetExpectContinueTimeout sets ExpectContinueTimeout in the
+// transport to the default value if not set.
+func SetExpectContinueTimeout(transport *http.Transport, t time.Duration) {
+	if transport.ExpectContinueTimeout == 0 {
+		transport.ExpectContinueTimeout = t
+	}
+}