bundlespec: rationalize the way we specify stream bundle version
Instead of having weird dedicated option for each version (v2, v3, etc) we
reuse the same "stream" parameters. This is consistent with the ability to
request a stream clone using "none-v2;stream=v2".
This changeset introduce no user visible change, this is pure internal cleaning.
#require rust
$ cat >> $HGRCPATH << EOF
> [format]
> use-dirstate-v2=1
> [storage]
> dirstate-v2.slow-path=allow
> EOF
$ hg init t
$ cd t
$ for i in 1 2 3 4 5 6 7 8 9 10; do touch foobar$i; done
$ hg add .
adding foobar1
adding foobar10
adding foobar2
adding foobar3
adding foobar4
adding foobar5
adding foobar6
adding foobar7
adding foobar8
adding foobar9
$ hg commit -m "1"
Check that there's no space leak on debugrebuilddirstate
$ f --size .hg/dirstate*
.hg/dirstate: size=133
.hg/dirstate.88698448: size=511
$ hg debugrebuilddirstate
$ f --size .hg/dirstate*
.hg/dirstate: size=133
.hg/dirstate.6b8ab34b: size=511
$ hg debugrebuilddirstate
$ f --size .hg/dirstate*
.hg/dirstate: size=133
.hg/dirstate.b875dfc5: size=511