Some cleanups.

delete the string.

both Win32/conio and *nix/curses implementations.

Changed license from GPL to LGPL.

Revert to magic number-based upop() (for now)

instead of assuming a local/global variable exists named scrn_width.

Elimiated status box flicker.

boxes of arbitrary size at arbitrary positions.

NOT limited by standard window padding.

top and bottom lines.

showbuf().

umonitor now uses showhelp() to display error log.

integers.

WIN_DYN forces the menu to return -2 after every keypress or kbhit timeout
(timeout set to one second)  Also, dynamic windows only have the text
of the options re-drawn, not the whole window.

Got rid of the kludgy signal stuff.

uifcc (curses) can be compiled with USE_SIGNALS to force menus to return
a -2 when a SIGALRM is recieved. This allows for the "real time" display of
the node status.

Issues:
Running umonitor over a network connection can cause keystrokes to be
interpreted erratically.

Cannot use escape to exit auto-refreshed menus.  (Same reason)

Musings:
Perhaps a new WIN_* bit to specify a dynamic menu?

replaced with printable ASCII chars: ` for bold and ~ for inverse. Improves
compatibility with source editors that don't correctly display/edit ctrl chars.