Before trying list of well-known candidates allow detection routine to
check if the binary is discoverable inside PATH already. This covers
cases for unknown distributions or user built packages, which could be
symlinked into `/usr/local/bin` to be discoverable before system packages
and Windows, where needed dependencies might have different packaging.

Signed-off-by: Arthur Sengileyev <arthur.sengileyev@gmail.com>

Add support for using sftp-server found within PATH

Bumps [github.com/urfave/cli/v2](https://github.com/urfave/cli) from 2.27.5 to 2.27.6.
- [Release notes](https://github.com/urfave/cli/releases)
- [Changelog](https://github.com/urfave/cli/blob/main/docs/CHANGELOG.md)
- [Commits](urfave/cli@v2.27.5...v2.27.6)

---
updated-dependencies:
- dependency-name: github.com/urfave/cli/v2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

…urfave/cli/v2-2.27.6

Build(deps): Bump github.com/urfave/cli/v2 from 2.27.5 to 2.27.6