bin/48689: Import fuser command

[pettai%nordu.net@localhost]

>Number:         48689
>Category:       bin
>Synopsis:       Import fuser command
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Mar 29 09:30:00 +0000 2014
>Originator:     Fredrik Pettai
>Release:        All NetBSD releases
>Organization:
NORDUnet A/S
>Environment:
NetBSD stinky 6.99.38 NetBSD 6.99.38 (GENERIC) #0: Sat Mar 29 06:08:46 UTC 2014 
 pettai@stinky:/usr/obj/sys/arch/amd64/compile/GENERIC amd64
>Description:
fuser is a useful command, but it's currently not implemented in NetBSD
>How-To-Repeat:

>Fix:
Import the fuser command from OpenBSD or FreeBSD?
http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/fstat/fuser.c?rev=1.2;content-type=text%2Fplain