nse of either
receive-pack and upload-pack the first reference is followed by
a NUL byte and then a list of space delimited server capabilities.
These allow the server to declare what it can and cannot support
to the client.</p>
</div>
<div class="paragraph">
<p>Client will then send a space separated list of capabilities it wants
to be in effect. The client MUST NOT ask for capabilities the server
did not say it supports.</p>
</div>
<div class="paragraph">
<p>Server MUST diagnose and abort if capabilities 