cmdutil: update finddate()
walkchangerevs() now returns contexts, does not take a cache func.
walkchangerevs: move 'add' to callback
Now walkchangerevs is a simple iterator over contexts
hgweb: added test case for extension loading phases (
issue1824)
this checks the order of module loading phases of hgweb.
`4) reposetup' lines are duplicated because hgweb calls
hg.repository() twice, one by __init__, another by refresh.