iproute2 identifiers >256

Right now it looks like the functionality of Bird that allows using iproute2 named identifiers (e.g. /etc/iproute2/rt_table as ipt_*) is restricted to values <=256 (https://gitlab.nic.cz/labs/bird/-/blob/master/sysdep/unix/main.c#L197). However the linux kernel supports much larger values. I know it supports table identifiers up to 0xffffffff (https://github.com/torvalds/linux/blob/master/include/uapi/linux/rtnetlink.h...), but I'm not sure about the others like rt_protos. Can we get Bird to allow these larger values? Thanks -- Patrick Hemmer