lfs: use byteskwargs() on some **kwargs for python 3 compat
Differential Revision: https://phab.mercurial-scm.org/D2566
Mercurial
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Mercurial is a fast, easy to use, distributed revision control tool
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$ make # see install targets
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$ hg debuginstall # sanity-check setup
$ hg # see help
Running without installing::
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