Add support for rejectUnauthorized msg property

nodes/core/io/21-httprequest.html

@@ -85,6 +85,9 @@
         <dd>If set, can be used to send cookies with the request.</dd>
         <dt class="optional">payload</dt>
         <dd>Sent as the body of the request.</dd>
+        <dt class="optional">rejectUnauthorized</dt>
+        <dd>If set to <code>true</code>, allows requests to be made to https sites that use
+            self signed certificates.</dd>
     </dl>
     <h3>Outputs</h3>
     <dl class="message-properties">

nodes/core/io/21-httprequest.js

@@ -196,6 +196,10 @@ module.exports = function(RED) {
             }
             if (tlsNode) {
                 tlsNode.addTLSOptions(opts);
+            } else {
+                if (msg.hasOwnProperty('rejectUnauthorized')) {
+                    opts.rejectUnauthorized = msg.rejectUnauthorized;
+                }
             }
             var req = ((/^https/.test(urltotest))?https:http).request(opts,function(res) {
                 // Force NodeJs to return a Buffer (instead of a string)