new composite status conditions: weaponstatus,\

armorstatus, and terrainstatus

This adds three special status items to show at a glance what the hero
is wielding, wearing, and standing on.

Each of the three items has its own boolean option rather than try to
fix them in with the existing opttional status conditions.  After a
lot of testing, I think the weapon and armor ones will prove useful
but the terrain one probably won't be.

Presently it is implemented for tty and curses.  When I developed it
six years ago, it was also working for X11 but I'm not able to test
the resurrection of that part so have left it out.

dat/opthelp

@@ -3,6 +3,7 @@ Boolean options not under specific compile flags (with default values in []):
 option setting, which is reached via the 'O' command.)
 
 acoustics      can your character hear anything                    [True]
+armorstatus    show extra status field summarizing worn armor     [False]
 autodescribe   describe the terrain under cursor                  [False]
 autodig        dig if moving and wielding digging tool            [False]
 autoopen       walking into a door attempts to open it             [True]
@@ -73,6 +74,7 @@ sparkle        display sparkly effect for resisted magical         [True]
                attacks (e.g. fire attack on fire-resistant monster)
 standout       use standout mode for --More-- on messages         [False]
 status_updates update the status lines                             [True]
+terrainstatus  show extra status field describing current location  [False]
 time           display elapsed game time, in moves                [False]
 tips           show some helpful tips during gameplay              [True]
 tombstone      print tombstone when you die                        [True]
@@ -83,6 +85,7 @@ travel         enables travelling via mouse click if supported;    [True]
 use_darkgray   use bold black instead of blue for black glyphs.    [True]
 use_inverse    display detected monsters in highlighted manner    [False]
 verbose        print more commentary during the game               [True]
+weaponstatus   show extra status field listing wielded weapon(s)  [False]
 whatis_menu    show menu when getting a map location              [False]
 whatis_moveskip skip same glyphs when getting a map location      [False]