Added FcgidMaxRequestLen in comment

.user.ini

@@ -1,5 +1,5 @@
 ; Uncomment these lines to change PHP parameters if you are using PHP with CGI or FastCGI. Only works with PHP starting from 5.3.0.
-; Note that with FastCGI, you might also want to set FcgidBusyTimeout and FcgidIOTimeout in your Apache config
+; Note that with FastCGI, you might also want to set FcgidBusyTimeout, FcgidIOTimeout and FcgidMaxRequestLen in your Apache config
 
 ;max_execution_time = 60
 ;post_max_size = 100M