laravel/framework — pull request #111 by devmach (2013-01-21 14:21:17+00:00)
Title: Update src/Illuminate/Session/Store.php

Fixing the issue #58

If session's lifetime parameter equals to 0 session should expire
after browser closes. But it doesn't, it expires immediately. If
lifetime is something like 30 mins, session class works as expected.

This patch fixes the problem and improves our math knowledge.