<p></p>
<blockquote>
<blockquote>
<pre><code>* Made one gcoap API change: Changed return type from `gcoap_req_send` from size_t to int, to allow negative return values. In this case, `gcoap_req_send` now returns `-ENOTCONN`, when the authentication process with the remote peer failed.
</code></pre>
</blockquote>
<p>Why not <code>ssize_t</code> then?</p>
</blockquote>
<p>True, I change it to ssize_t, that makes sense to keep, because positive values still returns sent bytes.</p>
<p>Regarding moving to a separate PR: I can do that. Gives possibly also again more attention that this PR is (IMHO) in advanced state.</p>

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