Update the tls-client README.md

[RonEld]

Update the tls-client application README.md as
it mentions EasyConnect, and it is not true anymore. Update the links as
well.
Fixes #228

[k-stachowiak]

@RonEld Can you please explain the additional changes provided with this PR? I know that the data needed for the public access have changed, so I was expecting the changes to address that, however, it is not clear from the commit, why they were introduced.

I built and ran the example and I confirm that it still works, so I approve the PR in principle. However, I think it would be better for the sake of tracking the changes to split this PR into two commits with descriptive messages.

[RonEld]

@k-stachowiak Thank yo for your review!

I have split the commit to two, per your suggestion.

[k-stachowiak]

@RonEld Thank you for addressing that. I still approve the PR.

[AndrzejKurek]

@sbutcher-arm - please review this PR, as it is targeted for 19.02.

[JanneKiiskila]

Bump @sbutcher-arm @k-stachowiak , you should merge this in...

[simonbutcher]

Nothing to do with me @JanneKiiskila, nor @k-stachowiak. We don't work on this. In actual fact, I think ownership has passed hands two or three times since this PR was opened.