help: make helptable a list instead of a tuple The table should always have been a list so that extensions can append their own help topics -- hgsubversion would like to do this now.

test-command-template: test 'children' template keyword

templates: 'children' keyword The template keyword 'parents' is already present and this just provides the complimentary template keyword.

changegroupsubset(): change variable names, simplify lookup logic

changegroup(): used "linkrev" instead of "revlink"

fix comment

Merge with stable

revset: fix ancestor subset handling (issue2298)

hgwebdir: use template paths configured in the hgrc (issue2281)

changegroup*(): use set instead of dict