bird: KIF: Invalid broadcast address 255.255.255.255 for em1

[Job Snijders]

Hi Fellow BIRD users,

It appears that BIRD does not fully appreciate RFC3021 style addresses
on Ubuntu 15.04, when I start BIRD:

	syslog:Nov 10 15:25:15 eunetworks-2 bird: KIF: Invalid broadcast address 255.255.255.255 for em1
	syslog:Nov 10 15:25:15 eunetworks-2 bird: KIF: Invalid broadcast address 255.255.255.255 for p2p2.1003
	syslog:Nov 10 15:25:15 eunetworks-2 bird: Started

	root at eunetworks-2: # ip -4 addr show dev em1
	2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
		inet 94.142.247.237/31 brd 255.255.255.255 scope global em1
		   valid_lft forever preferred_lft forever

	root at eunetworks-2: # ip -4 addr show dev p2p2.1003
	14: p2p2.1003 at p2p2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
		inet 78.152.32.177/31 brd 255.255.255.255 scope global p2p2.1003
		   valid_lft forever preferred_lft forever

Should I configure the Linux side of things differently or is this
something that needs resolving in BIRD itself?

	root at eunetworks-2:~# uname -a
	Linux eunetworks-2 3.19.0-32-generic #37-Ubuntu SMP Wed Oct 21 10:23:06 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

	root at eunetworks-2:~# dpkg -l | grep bird
	ii  bird                                   1.5.0-1+vivid+1                   amd64        Internet Routing Daemon

	root at eunetworks-2:~# lsb_release -a
	No LSB modules are available.
	Distributor ID:	Ubuntu
	Description:	Ubuntu 15.04
	Release:	15.04
	Codename:	vivid

Kind regards,

Job