There are 2 ways to construct LFS urls - from explicit URLs and from the
clone URL (which gets info/lfs appended). Previously there were multiple
paths where the Endpoint could be constructed in a short-circuit manner
which prevents future expansion in common functions. This standardises
the Endpoint construction so it always happens via NewEndpoint, and
NewEndpointFromCloneURL performs the extra step of appending info/lfs.
This has a current effect of supporting SSH urls in all config settings,
and not just the remote clone URL as before. But mostly this is to enable
future expansion (improved SSH support)
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