net/netmap: fix build with new graphviz

PR: 270710
MFH:    2023Q2
Display is still possible with dot an a viewer

net/netmap/Makefile

@@ -1,16 +1,16 @@
 PORTNAME=	netmap
 PORTVERSION=	0.1.3
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	net
 MASTER_SITES=	SF/${PORTNAME}/${PORTNAME}/NetMap%20${PORTVERSION}
 
-MAINTAINER=	ports@FreeBSD.org
+MAINTAINER=	dinoex@FreeBSD.org
 COMMENT=	Make a graphical representation of the surrounding network
 WWW=		http://netmap.sourceforge.net/
 
 LICENSE=	GPLv2
 
-RUN_DEPENDS=	dotty:graphics/graphviz
+RUN_DEPENDS=	dot:graphics/graphviz
 
 USES=		gmake
 

net/netmap/files/patch-README

@@ -0,0 +1,21 @@
+--- README.orig	2001-12-23 15:42:29 UTC
++++ README
+@@ -54,3 +54,18 @@ Suggestions, comments and bug-reports welcome!
+ Wouter Godefroy
+ wouter@belgoline.com
+   
++
++As dotty was removed in 2022,
++you can use "dot" and any suited viewer for the results.
++
++Some Examples:
++
++dot -Tpdf netmap.pdf netmap.dot
++xpdf netmap.pdf
++
++dot -Tsvg netmap.svg netmap.dot
++gqview netmap.svg
++
++dot -Tpng netmap.png netmap.dot
++xv netmap.png
++