在 mac os x 下面每次tunnelblick都自动启动。
因为tunnelblick 都会插入一个自启动项。
如果不想自动启动tunnelblick， 需要在关机，重启之前，退出tunnelblick
Automatically Starting Tunnelblick Upon Login
Tunnelblick was designed as a persistent menu icon that survives reboots. To this end, it inserts itself into the login items when it is started and only removes itself from the login items when you choose Quit from the menu or Command-Q from the "Details” window or "About…" window. So if you just log out, shut down, or restart your computer, or it crashes, the next time you log in, Tunnelblick will automatically start. If you do not want Tunnelblick to start automatically, quit Tunnelblick before you log out, shut down, or restart.
FROM:http://code.google.com/p/tunnelblick/wiki/zUsing#Automatically_Starting_Tunnelblick_Upon_Login