add package for BIRD Internet Routing Daemon

Here is the patch that adds a package for The BIRD Internet Routing
Daemon. It is updated to the current version of BIRD (v 1.2.2).

BIRD is an internet routing daemon that implements OSPF, RIP and BGP.
It is fast, lightweight and small (cca 300 kB), therefore ideal for
OpenWRT based routers.

The makefile is rather tricky, as BIRD have to be built two times  (for
IPv4 and IPv6 versions) and there are separate packages for BIRD daemon
and BIRD client, because client depends on libreadline and is not
strictly necessary.

Signed-off-by: Ondrej Zajicek <santiago@crfreenet.org>

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@20780 3c298f89-4303-0410-b956-a3cf2f4a3e73
upgrade to bird-1.2.3 (thanks Ondrej Zajicek)

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@21658 3c298f89-4303-0410-b956-a3cf2f4a3e73
net/bird: allow BIRD to support Unique Local Unicast Address (RFC 4193) type IPv6 addresses

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@22243 3c298f89-4303-0410-b956-a3cf2f4a3e73
net/bird: update bird to version 1.2.4

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@22480 3c298f89-4303-0410-b956-a3cf2f4a3e73
net/bird: update to version 1.2.5

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@23638 3c298f89-4303-0410-b956-a3cf2f4a3e73
Routing and Redirection: Moved programs for routing and redirecting/relaying traffic to the Routing and Redirection submenu.

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@26072 3c298f89-4303-0410-b956-a3cf2f4a3e73
net/bird: update to version 1.3.1

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@26835 3c298f89-4303-0410-b956-a3cf2f4a3e73
net/bird: update to version 1.3.3

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@28243 3c298f89-4303-0410-b956-a3cf2f4a3e73
packages/bird: use new service functions

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@29079 3c298f89-4303-0410-b956-a3cf2f4a3e73
packages: add missing conffiles define

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@29199 3c298f89-4303-0410-b956-a3cf2f4a3e73
bird: adjust for service_* code move

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@31043 3c298f89-4303-0410-b956-a3cf2f4a3e73
Update BIRD to version 1.3.7

Besides some nice new featues like an include command in config files, the
possibility to define protocol instances from templates, and support for BGP
peerings on link-local IPv6 addresses the new release also contains lots of
bugfixes.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@31719 3c298f89-4303-0410-b956-a3cf2f4a3e73
bird: link against librt when using eglibc

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@32548 3c298f89-4303-0410-b956-a3cf2f4a3e73
remove now redundant +USE_EGLIBC:librt dependencies

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@33481 3c298f89-4303-0410-b956-a3cf2f4a3e73
packages: fold the IPv6 menu into Network

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn+ssh://svn.openwrt.org/openwrt/packages@36635 3c298f89-4303-0410-b956-a3cf2f4a3e73