bin/190294: netstat -rs should support -z (reset stats)

[Allan Jude]

>Number:         190294
>Category:       bin
>Synopsis:       netstat -rs should support -z (reset stats)
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Tue May 27 00:30:00 UTC 2014
>Closed-Date:
>Last-Modified:
>Originator:     Allan Jude
>Release:        11-CURRENT
>Organization:
ScaleEngine Inc.
>Environment:
FreeBSD Nexus.HML3.ScaleEngine.net 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r264302M: Wed Apr  9 17:39:15 UTC 2014     root at Nexus.HML3.ScaleEngine.net:/usr/obj/usr/src/sys/GENERIC  amd64

>Description:
netstat -rs displays routing statistics

some other netstat subcommands, like netstat -s, support a -z flag that resets the statistics

netstat -rs should do this too

>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: