i18n-pt_BR: synchronized with bf6bc4681383

--HG--
branch : stable
histedit: refuse to edit history that contains merges (issue3962)

--HG--
branch : stable
cmdutil: core functionality to block during multistep commands (issue3955)

This adds a registration point and check functions that will allow
commands to check if multistep operations like an interrupted graft or
rebase are in progress before proceeding.

--HG--
branch : stable
extra : rebase_source : 40ea960e38d965df7922bb79ddca01c65de0b215
update: clear any clearable unfinished operations (issue3955)

Unclearable operations will cause an abort.

--HG--
branch : stable
extra : rebase_source : a13d71844c614681ca5c59f056bbc746d63d6296
commands: add checks for unfinished operations (issue3955)

commands checked:
  backout
  bisect
  commit
  graft
  import

--HG--
branch : stable
extra : rebase_source : 70ab6cd2f91f429efde78ece3ea26aa88293f20d
rebase: reorder parent check and state storage

This could cause a rebase to be 'in progress' even though it aborted.

--HG--
branch : stable
extra : rebase_source : 9dd3fa0f81f41623621952f23f9af1c9d3bda3c8
rebase: add checkunfinished support (issue3955)

--HG--
branch : stable
extra : rebase_source : 4083da861e344919496ff5666a454caf5ecfdf53
histedit: add checkunfinished support (issue3955)

The tests contain a couple corner cases where workarounds are now
required. Strictly speaking, these are behavior regressions, but of an
extremely obscure and marginal sort. Commits or updates in the middle
of a histedit would have almost always been fairly serious user error.

--HG--
branch : stable
extra : rebase_source : c2500334d0a3f792b5c2ae1473ac8690c5ea052a
transplant: add checkunfinished (issue3955)

Nobody loves transplant anymore, but it was the first command to have
a --continue flag.

--HG--
branch : stable
extra : rebase_source : e9cf2098522baa244ad1689c6a39006d29c6c289
mq: add checkunfinished support (issue3955)

--HG--
branch : stable
extra : rebase_source : 929bdf132592f4cca33663075f5a1a57e433bd80
update: add tracking of interrupted updates (issue3113)

This takes advantage of the new checkunfinished infrastructure

--HG--
branch : stable
extra : rebase_source : 9aef508c3539b0f19571b8ec7e730d926c1886e9
merge with i18n

--HG--
branch : stable