Make $_REQUEST processing independent of sub-calls

- Move HTTPInputData::process() into App::runFrontend()
- Pass $_REQUEST (including processed Input) to every Module method
- Delete $_POST parameters at Module post() calls because of $_REQUEST

src/Module/Item/Compose.php

@@ -40,7 +40,7 @@ use Friendica\Util\Temporal;
 
 class Compose extends BaseModule
 {
-	protected function post(array $request = [], array $post = [])
+	protected function post(array $request = [])
 	{
 		if (!empty($_REQUEST['body'])) {
 			$_REQUEST['return'] = 'network';