bug#41570: 26.3; dired chown

[A. Peter Blicher]

Dired chown command complains that chown is not available for windows
systems.  However, windows versions >= 7 (at least) have the "takeown"
command, which while not as comprehensive as the unix chown command at
least allows the current user to take ownership of a file/dir, as long
as the user has admin privileges.  It would be useful for dired to
permit this possibility on windows systems.


In GNU Emacs 26.3 (build 1, x86_64-w64-mingw32)
 of 2019-08-29 built on CIRROCUMULUS
Repository revision: 96dd0196c28bc36779584e47fffcca433c9309cd
Windowing system distributor 'Microsoft Corp.', version 6.1.7601
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