Fix lxc-netstat -- argument processing

Commit 21e487f2 introduced the use of getopt, but getopt will fail when
it sees arguments meant for netstat that are not in [short|long]options.
There should not be any ambiguity about arguments with the same letter:
those to the left of the -- are destined for lxc-netstat and those to
the right for the real netstat, which the original code handles by
shifting out all arguments it recognizes before the -- is hit.

Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>

src/lxc/lxc-netstat.in

@@ -67,19 +67,8 @@ get_parent_cgroup()
 	done
 }
 
-shortoptions='hn:'
-longoptions='help,name:,exec'
-
-getopt=$(getopt -o $shortoptions --longoptions  $longoptions -- "$@")
-if [ $? != 0 ]; then
-    usage
-    exit 1;
-fi
-
 exec=""
 
-eval set -- "$getopt"
-
 while true; do
 	case $1 in
 		-h|--help)
@@ -91,7 +80,7 @@ while true; do
 		--)
 			shift; break;;
 		*)
-			break;
+			break;;
 	esac
 done