[PATCH 1/2] secur32: Split push/pull schannel transports

[Anton Romanov]

> Do you really need separated transports? schan_transport already has
> separated in and out buffers. It seems to me that as long as you use only in
> buffers in reader and out buffers in writer (and it's already the case),
> there is no need for separated transport instances.
>
> Also, why do you use pointers here? Couldn't you just store the struct
> inside schan_context?
I don't really remember why I did it like this anymore. I will send new version.