bin/51323: ping6 -c sends a SIGINT to itself

[silasdb%gmail.com@localhost]

>Number:         51323
>Category:       bin
>Synopsis:       ping6 -c sends a SIGINT to itself
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jul 07 19:40:00 +0000 2016
>Originator:     Silas Silva
>Release:        NetBSD 7.0
>Organization:
	
>Environment:
System: NetBSD auron 7.0 NetBSD 7.0 (GENERIC.201509250726Z) amd64
Architecture: x86_64
Machine: amd64
>Description:
	When using -c option of ping6, it sends a SIGINT to itself, breaking
	shell scripts with monitor option (job control) enabled because of
	process group semantics.  Shells would just expect a simple non-zero
	exit status.  For more information see kre@ explanation:
	http://mail-index.netbsd.org/netbsd-users/2016/07/06/msg018667.html
>How-To-Repeat:
	ping6 -c 1 fe80::a800:ff:fe13:942f
>Fix: