Modifications for windows 7 quirks.
Modifications for windows 7 quirks.

The operations to create the Cygwin passwd and group files are exiting with
SIGSEGV even though they succeed (during boot).  Work around this for now
until I can get to the bottom of it.

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome