receiveResponse() may not return response body stream

[SpitchAG]

version 1.12.x, using SSL and ChunkedStream request.
something looks wrong in the receiveResponse() implementation:

[Note that in the following scenario, receiveResponse() follow a peekResponse() returning false because other end didnt send 100 continue (and also close connection after sending a body response)].

at begining of receiveResponse() a flushRequest() is performed.
If the other end closed the connection after having sent a response body,
the flushRequest , which deletes the requestStream object, ends up calling HTTPChunkedStreamBuf::close () which writes some stuff on the underlying socket.
This can throw because remote end closed the sock, but it shall not prevent receiveResponse() to provide a response body reader, and caller to retrieve this body.

i did a quick work around so that the flush exception is ignored and it seems to work ok (however it is probably unsafe)

Before 1.12.x, strangely enough, HTTPChunkedStreamBuf::close was sending the 5 bytes 0/r/n/r/n in a raw, and SSL_write() didnt trigger any exc (probably because nothing was really sent on the sock),
but since response trailer header impl, this was changed to 2 consecutive writes (3 long, then 2 long) , and this triggers the exception in my case (i didnt look further in SSL_write see what happens there)

thanks and keep the good work,

[obiltschnig]

Could you try the fix in 1.12.5?