Prevent unmodified msg.headers from breaking HTTP Request flows

Closed #1015

package.json

@@ -39,6 +39,7 @@
         "follow-redirects":"1.2.4",
         "fs-extra": "1.0.0",
         "fs.notify":"0.0.4",
+        "hash-sum":"1.0.2",
         "i18next":"1.10.6",
         "is-utf8":"0.2.1",
         "js-yaml": "3.8.4",
@@ -48,7 +49,7 @@
         "mqtt": "2.9.0",
         "multer": "1.3.0",
         "mustache": "2.3.0",
-        "nopt": "4.0.1",
+        "nopt": "3.0.6",
         "oauth2orize":"1.8.0",
         "on-headers":"1.0.1",
         "passport":"0.3.2",