A non-blocking sceNetConnect that cannot complete at once must fail with
EINPROGRESS (36, 0x80410124), as FreeBSD's connect does, and a repeated call
while it is pending with EALREADY (37). On Windows, Winsock reports the
first case as WSAEWOULDBLOCK, which was translated to EAGAIN (0x80410123); on
Linux, EINPROGRESS and EALREADY had no translation and became EIO
(0x80410105). Code that waits for the connection only when connect reports
EINPROGRESS treated both as a failed connection.
guest_sce_net connects a non-blocking socket to the loopback listener and
accepts 0 or EINPROGRESS; before this change it received EAGAIN on Windows.
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