Replace `select` with `poll` or better

[bparks]

See these resources:

• https://stackoverflow.com/questions/970979/what-are-the-differences-between-poll-and-select
• https://www.ulduzsoft.com/2014/01/select-poll-epoll-practical-difference-for-system-architects/
• https://daniel.haxx.se/docs/poll-vs-select.html
• BEST: https://beesbuzz.biz/blog/e/2013/10/10-the_problem_with_select_vs_poll.php
• Others: https://gist.github.com/beyondwdq/1261042