RqLengthAware wrongly assumes available gives a good indication about number of bytes to read when no content length is aviable

[laeubi]

RqLengthAware uses available in case of no content length is found, this is simply wrong, according to the docs this:

Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking, which may be 0, or 0 when end of stream is detected.

The default implementation even return always 0....

instead it should simply return the stream as is if the content length can't be computed!