Rearrange the channel buffer sizes into three neat use-editable values in options.h. Increasing RECV_MAX_WINDOW gives big network performance increases - even with the present buffers (which haven't changed) it performs a lot better. Next step is to make the window size a cmdline option.

#!/bin/sh
set -e

test "$1" = 'remove' || test "$1" = 'deconfigure' || exit 0
if test -x /etc/init.d/dropbear; then
  if test -x /usr/sbin/invoke-rc.d; then
    invoke-rc.d dropbear stop
  else
    /etc/init.d/dropbear stop
  fi
fi