mention that cache options could be used besides `remote modify` params

[shcheklein]

At least type can be specified and is taken into account for dvc remote modify command SSH remotes. More details here: treeverse/dvc#2704

UPDATE: See more details in #764 (comment) below.

[jorgeorpinel]

treeverse/dvc#2704 is a little confusing. Would be great if this issue was self-contained with a summery of what and why to improve the remote modify cmd ref.

[shcheklein]

@jorgeorpinel we have a list of options that are applicable for different remotes provided via expandable sections here (btw, section should be renamed Available Options).

In case of remote data management, when you set that remote as an external cache, specifically for SSH you can specify some options that are not mentioned in that list:

dvc remote add sshcache ssh://user@example.com:/cache
dvc config cache.ssh sshcache
dvc remote modify sshcache type symlinks,reflinks,copy

type in this case is similar to the regular cache config type we have. Not sure about reflinks though, @MrOutis and @efiop could clarify that?

I can imagine that protected should make sense in this case as well. Not sure about slow_link_warning.

@shcheklein , reflinks are supported :)

@shcheklein , protect make sense but is not enable, I was talking about it on treeverse/dvc#2542 could you take a look?