freeradius2: add mirror for older releases

Signed-off-by: Mislav Novakovic <mislav.novakovic@sartura.hr>

net/freeradius2/Makefile

@@ -12,7 +12,9 @@ PKG_VERSION:=2.2.7
 PKG_RELEASE:=1
 
 PKG_SOURCE:=freeradius-server-$(PKG_VERSION).tar.bz2
-PKG_SOURCE_URL:=ftp://ftp.freeradius.org/pub/freeradius/
+PKG_SOURCE_URL:=\
+	ftp://ftp.freeradius.org/pub/freeradius/ \
+	ftp://ftp.freeradius.org/pub/freeradius/old/
 PKG_MD5SUM:=b84b9ffa1ac9b20b2643e5a08ac483a1
 PKG_MAINTAINER:=Daniel Golle <daniel@makrotopia.org>
 PKG_LICENSE:=GPL-2.0