Updated Notification configuration notes (markdown)

Notification-configuration-notes.md

@@ -27,13 +27,30 @@ mailto://john@mail.mycompany.com/?to=steve@gmail.com
 
 For more help - see the Apprise email info https://github.com/caronc/apprise/wiki/Notify_email
 
+## POST/POSTS
+
+You can create arbitrary HTTP POST notifications using `post://` or `posts://` (SSL).
+To include a header - like for example if you need an authentication header, it needs to be added to the URL as `&+custom-header=hello`
+
+For example
+
+`posts://service.com?yes=please&+custom-header=hello`
+
+`custom-header` will be stripped from the URL and only used as a header, but you need to prefix it with `+` to declare it as a header.
+
+
 ## Forms/HTTP POST support
+
+This is for doing an actual HTTP webform style subsmission.
+
 - see https://github.com/caronc/apprise/wiki/Notify_Custom_Form
 
 ## JSON
 
 Use the `jsons://` notification type and simply set the body in the "Notification body"
 
+See note about headers in the POST/POSTS section
+
 ## GET/PLAIN API 
 
 See https://github.com/caronc/apprise/wiki/Notify_Custom_JSON#get-parameter-manipulation for the special syntax