Checks for strlcpy and atoll. These functions will need to be found for platforms that don't have them.
Now tests for either curses or ncurses. By default prefers to use curses, but will use ncurses if curses is not available or if forced by a configure flag. Also minor other tweaks.
Initial stab at the autoconf/automake stuff for idar. Not sure it's perfect, I've done a lot of this sort of stuff today ;)
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