SimplePie use distint cache for force_feed (#2852)

#fix https://github.com/FreshRSS/FreshRSS/issues/2524
In general, we should avoid using the same cache for feeds that are fetched with distinct parameters / settings..
PR upstream to SimplePie https://github.com/simplepie/simplepie/pull/643

lib/SimplePie/SimplePie.php

@@ -1417,7 +1417,8 @@ class SimplePie
 			// Decide whether to enable caching
 			if ($this->cache && $parsed_feed_url['scheme'] !== '')
 			{
-				$cache = $this->registry->call('Cache', 'get_handler', array($this->cache_location, call_user_func($this->cache_name_function, $this->feed_url), 'spc'));
+				$url = $this->feed_url . ($this->force_feed ? '#force_feed' : '');	//FreshRSS
+				$cache = $this->registry->call('Cache', 'get_handler', array($this->cache_location, call_user_func($this->cache_name_function, $url), 'spc'));
 			}
 
 			// Fetch the data via SimplePie_File into $this->raw_data
@@ -1771,7 +1772,8 @@ class SimplePie
 					{
 						trigger_error("$this->cache_location is not writable. Make sure you've set the correct relative or absolute path, and that the location is server-writable.", E_USER_WARNING);
 					}
-					$cache = $this->registry->call('Cache', 'get_handler', array($this->cache_location, call_user_func($this->cache_name_function, $file->url), 'spc'));
+					$url = $this->feed_url . ($this->force_feed ? '#force_feed' : '');	//FreshRSS
+					$cache = $this->registry->call('Cache', 'get_handler', array($this->cache_location, call_user_func($this->cache_name_function, $url), 'spc'));
 				}
 			}
 			$this->feed_url = $file->url;