Resolves: bug 248145
    Bug Description: Replace ds_newinst binary with perl script
    Reviewed by: nhosoi (Thanks!)
    Fix Description: 1) Inf needs to be able to read the .inf file from stdin.  This is what ds_newinst.pl does currently.
    2) getlogin seems not to work in all cases, so add a more robust replacement.
    Platforms tested: RHEL4, FC6
    Flag Day: no
    Doc impact: no