TODO.

Finish review/cleanup:
sys/windows


Merge prs:
 * Add timeout to tests for CI (~branch: always_timeout)

Local work:
 * Mark internal API as `pub(crate)`, rather then `pub` (branch: __TODO_pub-crate).
 * More windows cleanup (branch: __TODO_win-cleanup2)
 * rename macros to features, branch: rename-macros.
 * Mark internal types as pub(crate), rather then pub, branch sys-pub-crate.
   Depends on pr #1252.
     TODO: sys/windows and sys/unix.


TODO:
 * Look at `mio::net::SocketAddr` (for UDS), we can create it, see `sys::net`
   socket_addr.
 * Look at other branches: __check_review __keep_benchmarks
 * Wasm32 port, branches: wasm32-wasi, __keep_wasm32-wasi.