Win32 still has assembly issues and bssl wants to select() on both sockets and
stdin (doesn't work on Windows). But this is a start.
Change-Id: Iafc5215be281aed836c5ac2dc8b379399848a2c2
Reviewed-on: https://boringssl-review.googlesource.com/2090
Reviewed-by: Adam Langley <agl@google.com>
Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta).
(This change contains substantial changes from the original and
effectively starts a new history.)