net/quagga: add patches to fix IPv6, multi-segment AS_PATH UPDATE fix
- For the IPv6 problem description see also: https://bugzilla.quagga.net/show_bug.cgi?id=870 https://lists.quagga.net/pipermail/quagga-dev/2017-December/033309.html
- Another part of the multi-segment AS_PATH UPDATE message length calculation fix
PR: 214481
Reported by: dgilbert@eicat.ca