https://cygwin.com/pipermail/cygwin/2009-November/181347.html
subinacl not consistent with getfacl under ssh login (USERNAME=SYSTEM)
https://sourceware.org/pipermail/cygwin-patches/2002q2/002201.html
getfacl help/version patch
https://sourceware.org/pipermail/cygwin-patches/2002q2/002185.html
getfacl help/version patch
https://cygwin.com/pipermail/cygwin/2019-March/240708.html
win dirs don't handle lack of inherited rule(?): getfacl + tar dir Warning: Cannot acl_to_text:...
https://sourceware.org/pipermail/cygwin-patches/2002q2/002196.html
getfacl help/version patch