- Windows 10 now has usable symlinks [quality]

  https://blogs.windows.com/buildingapps/2016/12/02/symlinks-windows-10/

  We currently don't even try to create symlinks on Windows since they
  trigger a dialog.

- Add instructions on adding C:\build2\bin to PATH system-wide [bug doc 0.5.0]

! Native path filter for msvc-linux or optimize existing [quality]

- Rename disfigure to deconfigure [quality]

  Another alternative is unconfigure. Wonder if rename or add/keep alias.

- Can we use consts instead of macros for versions [quality]

  And use static_assert() to check. This will be required to transition to
  modules (current thinking says modules don't "leak" macros).

- Remove build2 repositories from scm.codesynthesis.com [infra]