Support route-views `sh ip bgp` dump

[digizeph]

Route-views sh ip bgp dump has a slightly different format. https://archive.routeviews.org/oix-route-views

➜  /tmp oneio https://archive.routeviews.org/oix-route-views/2026.07/oix-full-snapshot-2026-07-01-0000.bz2 | head -n 20
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network            Next Hop            Metric LocPrf Weight Path
*  0.0.0.0/0          147.28.0.3               0      0      0 3130 174 i
*  1.0.0.0/24         12.0.1.63                0      0      0 7018 13335 i
*  1.0.0.0/24         37.139.139.17            0      0      0 57866 13335 i
*  1.0.0.0/24         202.232.0.3              0      0      0 2497 13335 i
*  1.0.0.0/24         91.218.184.60            0      0      0 49788 13335 i
*  1.0.0.0/24         129.250.1.71          2001      0      0 2914 13335 i
*  1.0.0.0/24         198.129.33.85          710      0      0 293 13335 i
*  1.0.0.0/24         137.164.16.84            0      0      0 2152 13335 i
*  1.0.0.0/24         162.251.163.2            0      0      0 53767 13335 i
*  1.0.0.0/24         45.61.0.85               0      0      0 22652 13335 i
*  1.0.0.0/24         198.58.198.252           0      0      0 1403 13335 i
*  1.0.0.0/24         89.149.178.10           10      0      0 3257 13335 i
*  1.0.0.0/24         64.71.137.241            0      0      0 6939 13335 i
*  1.0.0.0/24         208.51.134.255           0      0      0 3549 3356 13335 i
*  1.0.0.0/24         217.192.89.50            0      0      0 3303 3356 13335 i

Our parser should be more resilient against such slight differences.