GitLab

* Add more logging in the LFS server

Adds more logging in the LFS server and stops sending internal server
error information to the client

* Add LFS Lock cursor implementation

* Simplify Claims in LFS and remove the float64 casts
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Lauris BH <lauris@nix.lv>