Link to logs in case of error when adding new feed

https://github.com/marienfressinaud/FreshRSS/issues/453

app/Controllers/feedController.php

@@ -136,7 +136,7 @@ class FreshRSS_feed_Controller extends Minz_ActionController {
 				Minz_Log::record ($e->getMessage (), Minz_Log::WARNING);
 				$notif = array (
 					'type' => 'bad',
-					'content' => Minz_Translate::t ('internal_problem_feed')
+					'content' => Minz_Translate::t ('internal_problem_feed', Minz_Url::display(array('a' => 'logs')))
 				);
 				Minz_Session::_param ('notification', $notif);
 			} catch (Minz_FileNotExistException $e) {
@@ -144,7 +144,7 @@ class FreshRSS_feed_Controller extends Minz_ActionController {
 				Minz_Log::record ($e->getMessage (), Minz_Log::ERROR);
 				$notif = array (
 					'type' => 'bad',
-					'content' => Minz_Translate::t ('internal_problem_feed')
+					'content' => Minz_Translate::t ('internal_problem_feed', Minz_Url::display(array('a' => 'logs')))
 				);
 				Minz_Session::_param ('notification', $notif);
 			}

app/i18n/en.php

@@ -89,7 +89,7 @@ return array (
 	'already_subscribed'		=> 'You have already subscribed to <em>%s</em>',
 	'feed_added'			=> 'RSS feed <em>%s</em> has been added',
 	'feed_not_added'		=> '<em>%s</em> could not be added',
-	'internal_problem_feed'		=> 'The RSS feed could not be added. Check FressRSS logs for details.',
+	'internal_problem_feed'		=> 'The RSS feed could not be added. <a href="%s">Check FressRSS logs</a> for details.',
 	'invalid_url'			=> 'URL <em>%s</em> is invalid',
 	'feed_actualized'		=> '<em>%s</em> has been updated',
 	'n_feeds_actualized'		=> '%d feeds have been updated',

app/i18n/fr.php

@@ -89,7 +89,7 @@ return array (
 	'already_subscribed'		=> 'Vous êtes déjà abonné à <em>%s</em>',
 	'feed_added'			=> 'Le flux <em>%s</em> a bien été ajouté',
 	'feed_not_added'		=> '<em>%s</em> n’a pas pu être ajouté',
-	'internal_problem_feed'		=> 'Le flux n’a pas pu être ajouté. Consulter les logs de FreshRSS pour plus de détails.',
+	'internal_problem_feed'		=> 'Le flux n’a pas pu être ajouté. <a href="%s">Consulter les logs de FreshRSS</a> pour plus de détails.',
 	'invalid_url'			=> 'L’url <em>%s</em> est invalide',
 	'feed_actualized'		=> '<em>%s</em> a été mis à jour',
 	'n_feeds_actualized'		=> '%d flux ont été mis à jour',