* fix msi installer not updating system path
* modify install script to add binary path to system path
* debug appveyor
* add debug message to add-path and update appveyor to be compatible with changes
* fix appveyorhelper.psm1 after accidentally removing call to uninstall
* fix typo
* use PS drive to modify PATH
* rename Add-Path to Add-MachinePath in export list
OpenSSh privilege separation model - http://www.citi.umich.edu/u/provos/ssh/privsep.html
Posix_spawn is implemented in POSIX adapter as an alternative to fork() that is heavily used in Privilege separation.
Additional state info is added to sshd to accommodate distinguishing the various modes (privileged monitor, unprivileged child, authenticated child).
Required service state (like config and host keys) is transmitted over pipes from monitor to child processes.
Changes to installation scripts and tests to accomodate new architectural changes
1. fix issue 764 (https://github.com/PowerShell/Win32-OpenSSH/issues/764)
2. move the add type to the script level so it only been added once
3. fix indents
4. make FilePath position 0.
5. add OpenSSHUtiles.psm1 in the build and package
