Improve php.ini-* documentation

php.ini-development

@@ -1474,7 +1474,7 @@ session.gc_maxlifetime = 1440
 ;       collection through a shell script, cron entry, or some other method.
 ;       For example, the following script would is the equivalent of
 ;       setting session.gc_maxlifetime to 1440 (1440 seconds = 24 minutes):
-;          find /path/to/sessions -cmin +24 | xargs rm
+;          find /path/to/sessions -cmin +24 -type f | xargs rm
 
 ; PHP 4.2 and less have an undocumented feature/bug that allows you to
 ; to initialize a session variable in the global scope.

php.ini-production

@@ -1474,7 +1474,7 @@ session.gc_maxlifetime = 1440
 ;       collection through a shell script, cron entry, or some other method.
 ;       For example, the following script would is the equivalent of
 ;       setting session.gc_maxlifetime to 1440 (1440 seconds = 24 minutes):
-;          find /path/to/sessions -cmin +24 | xargs rm
+;          find /path/to/sessions -cmin +24 -type f | xargs rm
 
 ; PHP 4.2 and less have an undocumented feature/bug that allows you to
 ; to initialize a session variable in the global scope.