Alert user if extract fails due to path length, and LongPathsEnabled != 1

[rasa]

Per ScoopInstaller/Extras#889 (comment) , let’s add a check to https://github.com/lukesampson/scoop/blob/master/libexec/scoop-checkup.ps1 that we are under Windows 10 Version 1607, or later, and if LongPathsEnabled in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem is not set to 1, alert the user.

[se35710]

Duplicate of #1523?

[rasa]

@se35710 They are certainly related.

[jfastnacht]

While the LongPathsEnabled check was implemented it still lacks the checkup for Windows 10 v1607, since I came across this problem on Windows 8.1 Pro.

The release ID needed should be available with:

Get-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion" -ErrorAction SilentlyContinue -Name 'ReleaseId'

This path is not available on Windows 8.1.