Allow NetBSD's libedit to be used instead of GNU Readline. (This simply

amounts to checking for -ledit instead of -lreadline.)

configure.in

@@ -656,7 +656,7 @@ fi
 AC_CHECK_LIB(sfio,     main)
 AC_CHECK_LIB(ncurses,  main, [], [AC_CHECK_LIB(curses, main)])
 AC_CHECK_LIB(termcap,  main)
-AC_CHECK_LIB(readline, readline)
+AC_SEARCH_LIBS(readline, [readline edit], [AC_DEFINE(HAVE_LIBREADLINE)])
 AC_SEARCH_LIBS(using_history, history, [AC_DEFINE(HAVE_HISTORY_FUNCTIONS)])
 
 if test "$PORTNAME" != "aix" -a "$PORTNAME" != "alpha"