Update Sahkan's seed node address

[SahkanDesertHawk]

Seed updates for sahkan

[abitmore]

Please rebase to latest develop branch (target release time 201812) or perhaps release branch (target release time 201810).

[SahkanDesertHawk]

Both blockchains are on the latest 2.0.180823 mainnet release.

[oxarbitrage]

What @abitmore means is to rebase the pull request to the corresponding repository. I suggest that this should go to develop but release is also an option if you want to be at master sooner.

To do this rebase, click the edit button next to the title:

And github will give you the option to change the base from master to develop.

I also suggest to change the pull request title into "Update sahkan seed nodes" or similar.

PD: The reason of the rebase is that as a development rule, we don't send any change directly into master except for changes in README.md.