Adapt 'find' command so that it not only searches in the directories given,
but also in the directories one level below, allowing to find the ncurses
library even in installations where ncurses is already Multi-Arch-ified.
New toplevel Makefile
added xisdnload, xmonisdn, toplevel config for isdnload
Added new interactive configuration utility using lxdialog.
Some adaptions for existing packages.
Some corrections in man pages.