(64) to 48.

directory: support for a library "root" directory
and support for importing "raw" directory listings (containing just dir names).

(for help file location).

Now changes current directory to ctrl_dir, allowing relative paths to be
created successfully by write_xxx_cfg() functions.

upper/lower case strings in new user-supplied strings.
Removed unused toggle options: UQ_COMP (computer type) and UQ_MC_COMP
(multiple choice computer questions).
Added advanced options: user database backups and mail database backups.

allow users to edit their posted messages on a specific sub-board.
Sub-board toggle options now default to last configured state.

suppress hard-coded displays (system info and active node list) during logon.

If not set and path not in argv[0], uses cfg.ctrl_dir + "../exec".