hardcoded value of 4.
A_K_NKEYS is currently 6 and this mismatch was stomping memory when
initializing the keys. (specifically gdb lost the exec file name if it was
a long path name).
plus a few bogons noted along the way:
1) Set EDIT_DISABLED if terminal type is emacs.
2) fix bug in NO_TTY mode which caused it to not notice CR or LF
3) implement EDIT_DISABLED within libedit to be somewhat like NO_TTY,
except that a prompt is printed first.
of the user's namespace. We need to do this because the readline
emulation functions call term_beep(), but readline isn't built using
the same (funky) namespace-protection method as the rest of libedit (it's
included like a normal library object).
Without this (fairly disgusting) hack, any program linked against
libedit will fail to link with an unresolved reference to term_beep()
if using an Elf toolchain (e.g. on the Alpha).
XXX Why this doesn't happen with NetBSD's a.out toolchain is a mystery
XXX to me, and I'm not sure I really want to know (given that a.out
XXX _should_ break the same way as Elf does in this case).
