Update to gnugk-5.7.

net/gnugk/Makefile

@@ -1,10 +1,10 @@
-# $OpenBSD: Makefile,v 1.88 2020/10/30 13:11:30 ajacoutot Exp $
+# $OpenBSD: Makefile,v 1.89 2021/03/06 07:53:26 ajacoutot Exp $
 
 BROKEN-hppa=		libpt.so.7.0: undefined reference to __sync_fetch_and_or_4
 
 COMMENT=		H.323 gatekeeper
 
-V=			5.6
+V=			5.7
 GH_ACCOUNT=		willamowius
 GH_PROJECT=		gnugk
 GH_TAGNAME=		v${V:S/./_/}

net/gnugk/distinfo

@@ -1,2 +1,2 @@
-SHA256 (gnugk-5_6.tar.gz) = CsqoYw9/nxe3wdPn+7rPgcn+LRo5EkE9pqNpzpNwRVI=
-SIZE (gnugk-5_6.tar.gz) = 1411002
+SHA256 (gnugk-5_7.tar.gz) = AmDpysKBFyXnZIsxJUaj5Uuvf8Y39RwcUTCh1EEDLyY=
+SIZE (gnugk-5_7.tar.gz) = 1412272

net/gnugk/patches/patch-RasSrv_cxx

@@ -0,0 +1,14 @@
+$OpenBSD: patch-RasSrv_cxx,v 1.3 2021/03/06 07:53:26 ajacoutot Exp $
+
+Index: RasSrv.cxx
+--- RasSrv.cxx.orig
++++ RasSrv.cxx
+@@ -13,7 +13,7 @@
+ //////////////////////////////////////////////////////////////////
+ 
+ #include "config.h"
+-#include <malloc.h>
++#include <stdlib.h>
+ #include <ptlib.h>
+ #include <ptlib/sockets.h>
+ #include <ptclib/enum.h>