It had used `id -un`, but it is not always equal to `Etc.getlogin`.
`id` returns the current user of the process, and `Etc.getlogin` returns
the user name logged in on the controlling terminal of the process.
This change uses `logname` by default. `id` remains as a fallback since
there seem to be some platforms where `logname` is not available:
49576b417c
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61759 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* Other ruby implementations use the spec/ruby directory.
[Misc #13792] [ruby-core:82287]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
