url: move _wraphttpresponse() from httpeer
This is a generally useful function. Having it on the url module
will make it more accessible outside of the HTTP peers.
Differential Revision: https://phab.mercurial-scm.org/D4770
debugcommands: print all CBOR objects
application/mercurial-cbor may contain multiple objects. Let's print
all of them.
Differential Revision: https://phab.mercurial-scm.org/D4769