network/unbound: Replaced backtick cmdsub

Signed-off-by: Robby Workman <rworkman@slackbuilds.org>

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

network/unbound/rc.unbound

@@ -106,7 +106,7 @@ stop() {
         return
     fi
     echo "Stopping Unbound..."
-    kill `cat $PIDFILE`
+    kill $(cat $PIDFILE)
     rm -f $PIDFILE
 }
 
@@ -116,7 +116,7 @@ reload() {
         return
     fi
     echo "Sending SIGHUP to Unbound..."
-    kill -HUP `cat $PIDFILE`
+    kill -HUP $(cat $PIDFILE)
 }
 
 case "$1" in