update net/dnstop to 20220113 (latest commit)

diff from George Rosamond (thanks!), tested also by Yifei Zhan.

net/dnstop/Makefile

@@ -1,11 +1,11 @@
 COMMENT =		pcap-based DNS query monitor
 
-DISTNAME =		dnstop-20180521
+DISTNAME =		dnstop-20220113
 CATEGORIES =		net
 
 GH_ACCOUNT =		measurement-factory
 GH_PROJECT =		dnstop
-GH_COMMIT =		a5a5d2e2ca9a433bb8f017682ac6f2085741bdf8
+GH_COMMIT =		9a16dd4814d680d0a9949ee52398461a1e0f72dc
 
 # 3-clause BSD
 PERMIT_PACKAGE =	Yes

net/dnstop/distinfo

@@ -1,2 +1,2 @@
-SHA256 (dnstop-20180521-a5a5d2e2.tar.gz) = ghdd/NJNndg3j+7sy1wpDXbdj0uWfkQHuZfAKoZei88=
-SIZE (dnstop-20180521-a5a5d2e2.tar.gz) = 86690
+SHA256 (dnstop-20220113-9a16dd48.tar.gz) = gptazI5D0wAxqj/rZiWPm4Ok3xS+oMefuX7cifsmsk0=
+SIZE (dnstop-20220113-9a16dd48.tar.gz) = 86878

net/dnstop/patches/patch-dnstop_c

@@ -1,6 +1,7 @@
---- dnstop.c.orig	Mon Sep 15 18:54:51 2014
-+++ dnstop.c	Tue Sep 16 11:23:38 2014
-@@ -46,6 +46,7 @@ static const char *Version = "20140915";
+Index: dnstop.c
+--- dnstop.c.orig
++++ dnstop.c
+@@ -48,6 +48,7 @@ static const char *Version = "@VERSION@";
  #include <netdb.h>
  
  #ifdef HAVE_NET_IF_PPP_H