proxy: update vendor

Signed-off-by: Evan Hazlett <ejhazlett@gmail.com>

vendor/github.com/jimstudt/http-authentication/basic/bcrypt.go

@@ -0,0 +1,15 @@
+package basic
+
+import (
+	"fmt"
+	"strings"
+)
+
+// Reject any password encoded using bcrypt.
+func RejectBcrypt(src string) (EncodedPasswd, error) {
+	if strings.HasPrefix(src, "$2y$") {
+		return nil, fmt.Errorf("bcrypt passwords are not accepted: %s", src)
+	}
+
+	return nil, nil
+}