* Test Fixes on downlevel machines
1. Test fix to run on win7 and win8
2. Add -onecore parameter to start-opensshpackage in build helper script
3. Add copying of libcrypto.dll and libcrypto.pdb
4. Update the build number on appveyor.yml
docker ssh issue
PowerShell/Win32-OpenSSH#666
a) fdopen changes to accept the /dev/null device
b) fix the select (using same fdset as readfdset, exceptfdset) issue with the unix opensssh code.
changed keyscan pester test to refer to localhost (127.0.0.1) instead of GitHub.com
PowerShell/Win32-OpenSSH#731
Fix the ASSERT_HANDLE issue..
ASSERT_HANDLE should fail if handle is either NULL or INVALID_HANDLE.
Added new testcases for the null device.
1. Deploy the key files to separate folder to avoid overwriting.
2. Enable hostkeys and kex unit tests.
3. Generate debug info in pdb
4. minor update on snmprintf
1. Reduce the console output of build
2. move to use powershell core 6.0.0.14
3. one minor fix in pester tests.
* Update the path of unittest results and build log. suppress the warning message.
* limitoutput of choco installation.
* fix of quotes
* remove redundant log
* Set x64 Release build as default