Fix for "tr-pass" handling

[ykopel]

The commit of 497e475
Caused to all the cases that will go into this "if" to be bypassed.
I commented there:

These lines will cause each request to fall to passthrough bypass:

   // If we had a GET request that has data after the
   // get request, do blind tunnel
    } else if (state == PARSE_DONE &&
               t_state.hdr_info.client_request.method_get_wksidx() == 
               HTTP_WKSIDX_GET &&
               ua_raw_buffer_reader->read_avail() > 0 &&
               !t_state.hdr_info.client_request.is_keep_alive_set()) {
      do_blind_tunnel = true;
    }

This is because ua_raw_buffer_reader->read_avail() always will be grater than zero.
You haven't see it until now because of another bug (ykopel@5817738) that cause is_transparent_passthrough_allowed() to be always false and this for it never reached to your lines.
This is why I suggest to just delete them meantime.