2019-12-30 09:57:23 by Henrik Grubbström (Grubba) <email@example.com>
CHANGES: Added some more about Thread.Thread()->wait().
o Stdio.UDP()->send() no longer throws errors on EMSGSIZE and EWOULDBLOCK.
a thread exits
by throwing, the thrown value is propagated to wait().
a thread exits by throwing, the thrown value is propagated to
Previously it was sent directly to master()->handle_error().
o String.trim_all_whites() renamed String.trim().