error: derive RevlogError from HintException instead of Exception This will allow us to now pass hints into this exception.

error: refactor common hint-pattern into a common base class I'm about to make another exception class require hints, so third strike and you refactor.

merge with stable

i18n-pt_BR: synchronized with 2664f536a97e

util: allow to specify buffer size in popen4 We will need unbuffered IO to restore real time output with ssh peer. Changeset ec171737aaf1 seems to indicate playing with this value could be dangerous, but does not indicate why.

sshpeer: extract the forward output logic We are about to make a more aggressive use of this when reading and writing on the other pipes. We it needs to be reusable.

sshpeer: break "OutOfBandError" feature for ssh (BC) When we'll be using the ssh's 'stderr' for realtime output successfully, it will no longer be possible to use 'stderr' to carry the error message (because it is already consumed by the real time output logic. This feature is very rarely used (test says largefile only) and I think breaking its output pattern is worth the benefit of having real time output with ssh.

error: allow a 'hint' to OutOfBandError This will be useful when changing the behavior of OutOfBandError for ssh in the next changeset.

tests: fix test-clone on vfat

wireproto: remove unused 'store' import