K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2020-09-21T17:06:36.727432Z
K 7
svn:log
V 184
xargs: add some long options for GNU compatibility

These are low-effort to add, so let's just do it.

Reported by:	"LukeShu" on Hacker News (-r / --no-run-if-empty)
MFC after:	1 week

END