Stop warning from to_win32_path() on POSIX.

Prebuilt binaries with development headers and documentation for common platforms are in Assets below:

Fix last commit on VS2017.

Prebuilt binaries with development headers and documentation for common platforms are in Assets below:

Add the beginnings of a to_win32_path(), though it's not finished yet.

Prebuilt binaries with development headers and documentation for common platforms are in Assets below:

Fix construct<mapped_file_handle> having the wrong parameter order.

Prebuilt binaries with development headers and documentation for common platforms are in Assets below:

Hopefully fix installability on CI.

Prebuilt binaries with development headers and documentation for common platforms are in Assets below:

Prebuilt binaries with development headers and documentation for common platforms are in Assets below:

Try more github actions instability workarounds.

Prebuilt binaries with development headers and documentation for common platforms are in Assets below:

Work around build failure in status code config on VS2017.

Prebuilt binaries with development headers and documentation for common platforms are in Assets below: