bgpd: Update dump to allow Extended Time Format

Allow the bgp dump functionality to handle the Extended Time format
as specified in RFC 6396.

Fixes a segmentation fault with multiple dump rules as well.

Signed-off-by: Alexis Fasquel <alexis@pch.net>
Acked-by: Donald Sharp <sharpd@cumulusnetworks.com>
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
5 files changed