Pkzip/unzip required *.* to add/extract all files in a directory. <sigh>

un_qwk no longer deletes packet file (responsibility of caller).
Updated bracket style.

getkey() now returns immediately if input_thread isn't running (stops event thread from waiting for user input).

Fixed problem with using ls/nlst locally (displayed full path).

Group and sub listings can be aborted and the user will still be able to enter up to the max sub/grp number to configure.

Created free_text() to free TEXT.DAT memory.
load_cfg() will now free the previous configuration data and text.dat memory.

This allows multiple instances with only one instance handling mail sends.