Add info about http redirects (#677)

* Add info about http redirects

* change explanation

Author: TomWFox

_includes/cloudcode/cloud-code-advanced.md

@@ -8,7 +8,7 @@ A simple GET request would look like:
 
 ```javascript
 Parse.Cloud.httpRequest({
-  url: 'http://www.awesomewebsite.com/'
+  url: 'https://www.awesomewebsite.com/'
 }).then(function(httpResponse) {
   // success
   console.log(httpResponse.text);
@@ -24,7 +24,7 @@ A GET request that specifies the port number would look like:
 
 ```javascript
 Parse.Cloud.httpRequest({
-  url: 'http://www.awesomewebsite.com:8080/'
+  url: 'https://www.awesomewebsite.com:8080/'
 }).then(function(httpResponse) {
   console.log(httpResponse.text);
 }, function(httpResponse) {
@@ -34,6 +34,19 @@ Parse.Cloud.httpRequest({
 
 Valid port numbers are 80, 443, and all numbers from 1025 through 65535.
 
+By default, `Parse.Cloud.httpRequest` does not follow redirects caused by HTTP 3xx response codes, the `followRedirects: true` option can be used to change this.
+
+```javascript
+Parse.Cloud.httpRequest({
+  url: 'https://www.awesomewebsite.com/',
+  followRedirects: true
+}).then(function(httpResponse) {
+  console.log(httpResponse.text);
+}, function(httpResponse) {
+  console.error('Request failed with response code ' + httpResponse.status);
+});
+```
+
 ### Query Parameters
 
 You can specify query parameters to append to the end of the url by setting `params` on the options object.  You can either pass a JSON object of key value pairs like:
@@ -578,4 +591,4 @@ const config = await Parse.Config.get({useMasterKey: true});
 const privateParam = config.get("privateParam");
 ```
 
-By default, Parse Config parameters can be publicly read which may be undesired if the parameter contains sensitive information that should not be exposed to clients. A parameter can be made readable only with the master key by setting the `Requires master key?` property via the Parse Dashboard to `Yes`.
+By default, Parse Config parameters can be publicly read which may be undesired if the parameter contains sensitive information that should not be exposed to clients. A parameter can be made readable only with the master key by setting the `Requires master key?` property via the Parse Dashboard to `Yes`.