Finished first complete implementation of conditional ...

processing in the Configuration File using ==, !=, and variable existence.

Removed debugging print statement in the conditional logic. ...

Program now allows User-Defined Variables to be re-defined.
Conditional keywords changed to: .if and .endif.

Now catches .ENDIF statements which are not on a line by themselves. ...

Added missing error message and made error messages concerning
conditionals a bit clearer and more consistent with other error message formats.

Implemented variable existence conditional in Config File parser.

Changed CMDSHELL/wildcard escape to '"' from '#'.

Changed escape char for CMDSHELL and wildcard processing to use " instead of #

Finished sorting logic. Fixed bug with Win32 case collapse. ...

Changed arithmetic in poll() which sets reduced period for
next refresh if a locked mutex is encountered.

Implemented support for fNONE - no sorting.

Changed SORTBYFIELD to be the *name* not the number of the field desired. ...

Check SORTBYFIELD to see if it makes sense.  If not, it is hardwired to fNAME.

Inlined the sort routine into BuildDirList(). ...

Added title bar information about current sort.

First implementation of sorting algorithm. ...

Keyboard support and title bar display for sorting implemented.

More work on sorting.

Restructured code to prepare for enabling sorting by various fields. ...

Added SORTBYFIELD and SORTREVERSE options.
This restructuring speeded up display calculation considerably.

All User-Settable options can now have a blank RHS; means option set to default value. ...

MAXDIR, MAXDIRBUF, MAXHIST, MAXHISTBUF have been retired in favor of MAXMENU and
MAXMENUBUF which are common parameters for all dynamic menus.
Added Wildcard History menu to track all wildcard-based selections. Menu has
both accelerator key and mouse/key combo to popup that menu.
Added WILDCARD= feature to Configuration File.

Documented blank RHS OK for all options. Removal of old ...

MAXDIR/HIST+BUF options in favor of common MAXMENU+BUF used
by all dynamic menus.

Documented changed to common menu bounding options, MAXMENU and MAXMENUBUF.

Removed MAXHIST, MAXHISTBUF, MAXDIR, MAXDIRBUF. Added MAXMENU, MAXMENUBUF.

Changed default CMDSHELL (disabled) to blank RHS.

Documented SELWILD, RHS now allowed on string options, ...

CMDSHELL disable is just a blank now, and CMSHELL escape
is now #.

Ran program through 'flip' to ensure Unix line termination. ...

Program Function Key handlers now return 'break' consistently
to make sure a user key rebinding does not conflict with some Tk default.
Back to displaying full version number or Titlebar.
# character now used both to escape CMDSHELL and wildcard processing.
RHS of string options can now be blank -> leaves option as default value.
This eliminates the need for the "" construct for CMDSHELL processing.
Implemented Select Via Wildcard feature.

Added SELWILD key definition.

Documented changed in version number display on Title Bar.

Only show major/minor version number (x.x) on Title Bar.

Switched string->num conversions from atoi to int(string,base). ...

This avoids an unnecessary import.

Documented FONTDECR fix.

Added code to precent FONTDECR from decrementing font sizes to less than 1.

Document fix for CMDSHELL processing of User-Defined Commands.

Changed logic so CMDSHELL processing, if enabled, is *only* ...

done when KeyRunCommand is invoked via the RUNCMD key - i.e,
Not when commands are played back via the Command History
Mechanism.  This is a cleaner way to prevent CMDSHELL cascading
on history invocations and also fixes a bug wherein a Command
Definition would get processes with CMDSHELL if that command
was replayed from the history.

Integrated Haggard's comments.

Fixed typo.