Re: [PATCHv4 3/4] Support ref namespaces for remote repositories via upload-pack and receive-pack

josh@joshtriplett.org writes:

Fair enough.  We'd thought of NULL as a fairly logical representation
for a null ref sent as a dummy ref just to send capabilities,...

I am not objecting to that part. NULL may be a logical thing to throw at
when the interface is to take only strings that begin with refs/... and
you have to occasionally send something different.

But that is a line of thought that is only valid while there is only one
"something different" (i.e. "capabilities^{}") and the current code
happens to have only one such different thing to send, but the approach
closes the door to allow us sending things other than that single
exception in the future without redoing your patch. That was what I found
objectionable.