http://bugs.winehq.org/attachment.cgi?id=19477
* functionality of non-message-mode (byte type) is preserved.
* putting too many messages into the queue runs wineserver out of file descriptors, but the solutions to that are too much work for this revision, to be included, so - tough.
* research indicates that message-mode is supposed to block when resources are low, but that would require a per-file mutex. again - too much work for this revision.
l.