Add ping6.c, unchanged from NetBSD CVS.

cvsweb link:
http://cvsweb.netbsd.org/bsdweb.cgi/src/sbin/ping6/ping6.c?rev=1.73&content-type=text/x-cvsweb-markup&only_with_tag=MAIN

Change-Id: Ie9646ccb41d68f47138f12c686fa40435bdaba8d
1 file changed
tree: 374008e05a2cd5ae8814269af8d34f3d3fa6f1c1
  1. ping6.c