29297f8531
Not all distros build their readline linked with a termcap library, since apps are (apparently) supposed to choose one for themselves and explicitly link to it when using readline. So add some checks to figure out whether readline is already linked, and if not, prefer ncurses since we use that for nmtui already. ax_lib_readline based off: http://www.gnu.org/software/autoconf-archive/ax_lib_readline.html