chown() clears the setuid bit of a file on Linux (and its setgid bit, if
the file is group-executable), even when run by root and even when the
owner/group are unchanged. Since the owner/group chown ran after the
permissions chmod, any syncfiles entry combining owner=/group= with a
setuid/setgid permissions= value silently lost the special bits.
Markus Hilger
9788d563aa