branch closing: mark closed branches with a 'close' extra
Adds a --close-branch option to commit.
When --close-branch is present the commit will mark the changeset
with close=1 in the changeset extras field.
If a regular changeset is added on top of a closed head the branch
is no longer considered closed, and thus re-opened.
% prepare repo
adding FOO.txt
adding QUICK.txt
adding bar.txt
% verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
3 files, 1 changesets, 3 total revisions
% introduce some bugs in repo
% verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
data/FOO.txt.i@0: missing revlog!
0: empty or missing FOO.txt
FOO.txt@0: f62022d3d590 in manifests not found
data/QUICK.txt.i@0: missing revlog!
0: empty or missing QUICK.txt
QUICK.txt@0: 88b857db8eba in manifests not found
data/bar.txt.i@0: missing revlog!
0: empty or missing bar.txt
bar.txt@0: 256559129457 in manifests not found
3 files, 1 changesets, 0 total revisions
9 integrity errors encountered!
(first damaged changeset appears to be 0)