sqm-scripts: syncronise changes made for Openwrt pull request

This commit includes the Makefile changes & small menu/typo fixes
done for the Openwrt pull request.

Additionally I moved the Luci app also to /net, as the Openwrt packages does not have a separate /luci dir. But I did not include that change in here.

For Openwrt I also changed the config defaults slightly:
eth1 interface, my own speeds, advanced options initially hidden

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>