add "ratelimit" flavour to net/isc-bind to build it with the experimental DNS

response rate limiting (DNS RRL) patchset, http://www.redbarn.org/dns/ratelimits

net/isc-bind/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.2 2012/08/07 07:44:27 sthen Exp $
+# $OpenBSD: Makefile,v 1.3 2012/08/31 09:16:35 sthen Exp $
 
 COMMENT=	Berkeley Internet Name Daemon
 
@@ -26,6 +26,16 @@ PERMIT_DISTFILES_FTP=	Yes
 WANTLIB += c crypto m pthread xml2 z
 
 MASTER_SITES=	${MASTER_SITE_ISC:=bind9/$V/}
+MASTER_SITES0=	http://ss.vix.com/~vixie/
+
+FLAVORS=	ratelimit
+FLAVOR?=
+
+.if ${FLAVOR:L:Mratelimit}
+PATCHFILES+=	rl-$V.patch:0
+.else
+SUPDISTFILES+=	rl-$V.patch:0
+.endif
 
 MODULES=	converters/libiconv
 LIB_DEPENDS=	textproc/libxml

net/isc-bind/distinfo

@@ -1,2 +1,4 @@
 SHA256 (bind-9.9.1-P2.tar.gz) = pG7PYXe2nW6ag6FfeS0FlK3MjoAAhiCN2bhEUq+4TQ4=
+SHA256 (rl-9.9.1-P2.patch) = me/ZUVgs55DidAguC+2uppi5t/Sc8d44d1JYOZPPIRU=
 SIZE (bind-9.9.1-P2.tar.gz) = 7223896
+SIZE (rl-9.9.1-P2.patch) = 80440

net/isc-bind/pkg/DESCR

@@ -2,3 +2,7 @@ BIND is open source software that implements the Domain Name System
 (DNS) protocols for the Internet. It is a reference implementation
 of those protocols, but it is also production-grade software,
 suitable for use in high-volume and high-reliability applications.
+
+The optional "ratelimit" flavour builds BIND9 with the experimental
+patches to add rate limits for authoritative servers, information about
+how to use this is available at http://www.redbarn.org/dns/ratelimits