py3: use pycompat.byteskwargs() to fix keyword arguments handling
I missed these when I fixed keyword arguments handling in the whole file.
Differential Revision: https://phab.mercurial-scm.org/D2410
Matt Harbison <matt_harbison@yahoo.com> [Fri, 23 Feb 2018 20:50:10 -0500] rev 36416
tests: add HTTP POST and PUT support to the $LOGDATE$ substitution
The lfs serving code uses both POST and PUT requests (and there's existing
support for POST).