fixed checksum byte calculation for other versions than 0x2019
fixed rare problem with padsize
updated info to stock firmware 2.00.20
fixed typos
Signed off by: Matthias Buecher <mail@maddes.net>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19683 3c298f89-4303-0410-b956-a3cf2f4a3e73