Stop relying on $HOME being set in the unit tests
When I test Tor with $HOME unset, I see the following error:
options/validate__uname_for_server: [forking] FAIL ../src/test/test_options.c:507: expected log to not contain entries Captured logs: 1. warn: "Couldn\'t find $HOME environment variable while expanding \"~/.tor\"; defaulting to \"\".\n" 2. warn: "Default DataDirectory is \"~/.tor\". This expands to \"/.tor\", which is probably not what you want. Using \"/usr/local/var/tor\" instead\n" [validate__uname_for_server FAILED]
This test has been around since 0.2.8.1-alpha.