Refactor Api transport to use Guzzle (and new variables syntax) (#10070)

* Allow new {{ $xxxx }} syntax

* Properly handle urlencode on variable values without braking the URL, and uses Blades

* Doc
Doc typo

* use Guzzle for HTTP requests

* Add Basic auth support

* Doc update

* clean

* Revert Blades, but keep the {{ $xxxx }} syntax

* Revert Blades, but keep the {{ $xxxx }} syntax

* Init Vars and comments

* Notifications

* api-options are not required

* Update notifications.rss

includes/html/print-alert-transports.php

@@ -65,7 +65,9 @@ foreach (dbFetchRows($query) as $transport) {
         }
 
         $val = $transport_config[$item['name']];
-
+        if ($item['type'] == 'password') {
+            $val = '<b>&bull;&bull;&bull;&bull;&bull;&bull;&bull;&bull;</b>';
+        }
         // Match value to key name for select inputs
         if ($item['type'] == 'select') {
             $val = array_search($val, $item['options']);