osx installer creates startup items even if you don't want them

Reported by Thomas Hardly:

Finally got around to installing the OSX Tor 0.1.0.8-rc Bundle. I
selected "Customize" for the install and chose to install Tor only and
nothing else. The installer installed a Tor directory inside of
/Library/StartupItems/. Which contained a file called Tor.loc that
contained the text: "//Library/Tor"

While this is not a valid StartupItem, I didnt choose to install any
StartupItem's. It shouldnt be installing anything in that directory.

[Automatically added by flyspray2trac: Operating System: OSX 10.4 Tiger]

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