Tracepath is broken

[Antono Vasiljev]

It different from traceroute and missing some info.

This bug is also affects gnome-nettool:
https://bugs.launchpad.net/ubuntu/+source/gnome-nettool/+bug/369993

$ traceroute github.com

traceroute to github.com (207.97.227.239), 30 hops max, 60 byte packets
 1 192.168.1.1 (192.168.1.1) 1.349 ms 5.258 ms 5.175 ms
 2 178.126.128.1 (178.126.128.1) 57.997 ms 59.468 ms 61.402 ms
 3 mm-123-80-84-93.dynamic.pppoe.mgts.by (93.84.80.123) 64.205 ms 65.643 ms 67.261 ms
 4 10.240.8.129 (10.240.8.129) 68.825 ms 70.642 ms 72.560 ms
 5 core.10g.net.belpak.by (93.84.122.41) 74.976 ms 76.786 ms 78.258 ms
 6 te2-4.l3-core-2.mck.net.belpak.by (93.84.125.2) 80.437 ms 56.155 ms 56.428 ms
 7 po31.l3-gw-2.mck.net.belpak.by (193.232.249.76) 59.123 ms 60.627 ms 62.336 ms
 8 83.229.241.121 (83.229.241.121) 95.582 ms 97.420 ms 100.002 ms
 9 83.229.226.101 (83.229.226.101) 100.714 ms 96.211 ms msk-b4-hq-ae0.main.synterra.ru (83.229.225.5) 98.077 ms
10 ae7.RT.MR.MSK.RU.retn.net (87.245.253.169) 109.185 ms 110.601 ms 112.515 ms
11 xe000-8.RT.EQX.ASH.US.retn.net (87.245.233.118) 249.085 ms 249.955 ms 249.832 ms
12 * * *
13 edge3.iad.rackspace.net (207.235.17.129) 219.433 ms 220.859 ms 223.582 ms
14 vlan905.core5.iad2.rackspace.net (72.4.122.10) 224.971 ms 226.626 ms 227.579 ms
15 aggr301a-1-core5.iad2.rackspace.net (72.4.122.121) 229.892 ms 235.406 ms 235.425 ms
16 github.com (207.97.227.239) 235.836 ms 217.763 ms 219.882 ms

tracepath github.com
 1: 192.168.1.11 0.188ms pmtu 1500
 1: 192.168.1.1 2.015ms asymm 2
 1: 192.168.1.1 1.604ms asymm 2
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     Too many hops: pmtu 1500
     Resume: pmtu 1500

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