narrow: mark wire proto capability names experimental and versioned
We already plan to add a "widen" wire protocol command to the "narrow"
capability, so let's version the capabilities as "exp-narrow-1" and
"exp-ellipses-1". When we add the "widen" command, we will then add a
"exp-narrow-2" capability to indicate support for that command.
Differential Revision: https://phab.mercurial-scm.org/D4529
#require serve
$ hg clone http://localhost:$HGPORT/ copy
abort: * (glob)
[255]
$ test -d copy
[1]
$ $PYTHON "$TESTDIR/dumbhttp.py" -p $HGPORT --pid dumb.pid
$ cat dumb.pid >> $DAEMON_PIDS
$ hg clone http://localhost:$HGPORT/foo copy2
abort: HTTP Error 404: * (glob)
[255]
$ killdaemons.py