contrib/perf: perfparents handle tiny repos refuse to run if there are not enough commits

contrib/perf: fix perfmergecalculate merge.calculateupdates requires an array of ancestors and followcopies

contrib/perf: fix perffncachewrite fncache.write requires a transaction (and thus a lock)

contrib/perf: omit duplicated function

contrib/perf: name functions to match decorators

hghave.py: remove execute bit

format: create new repository as 'generaldelta' by default Since we have pushed back the performance issue related to general delta behind another configuration (Still off by default), we can safely create new repository with general delta support. As client are compatible with it since Mercurial 1.9 (4.5 years ago) I do no expect any significant compatibility issues.

shelve: use colon instead of quotes in 'changes to' description If detailed conflict markers are enabled and the closing quote gets truncated, editors will often screw syntax highlighting up from that point because they'll see an opening quote and think it's the beginning of a string. In tests, the hashes change because the commit messages of the shelved bundles also change.

merge.applyupdates: create absentfilectxes for change/delete conflicts At the moment no change/delete conflicts get to this point -- we're going to make that happen in an upcoming patch.

mergestate: add methods to queue files to remove, add or get These are meant for use by custom merge drivers that might want to modify the dirstate. Dirstate internal consistency rules require that all removes happen before any adds -- this means that custom merge drivers shouldn't be modifying the dirstate directly.