Log Message:
git-lfs: update to 2.6.1

2.6.1
This release contains miscellaneous bug fixes since v2.6.0. Most notably,
release v2.6.1 restores support for alternate repositories, which was
accidentally broken in v2.6.0.

2.6.0
This release adds better support for redirecting network calls from a Git LFS
API server to one that requires a different authentication mode, builds Git LFS
on Go 1.11, and numerous other bug fixes and modifications.