Update lua api docs

doc/lua.adoc

@@ -14,6 +14,22 @@ Example:
 
  local str = nh.an("unicorn");
 
+
+=== debug_flags
+
+Set debugging flags.
+
+|===
+| mongen           | boolean | Do monsters generate
+| hunger           | boolean | Does hero's hunger-state increase
+| overwrite_stairs | boolean | Allow special-file commands overwrite the stairs
+|===
+
+Example:
+
+ nh.debug_flags({ mongen = false, hunger = false });
+
+
 === dnum_name
 
 Returns the full dungeon name (as defined in dungeon.lua) for the dungeon
@@ -23,6 +39,17 @@ Example:
 
  local dungeon_name = nh.dnum_name(u.dnum);
 
+
+=== doturn
+
+Execute gameloop once, or until multi-turn action is done if
+optional boolean parameter is true.
+
+Example:
+
+ nh.doturn();
+
+
 === dump_fmtstr
 
 Returns a string replacing special format chars with game data.
@@ -140,7 +167,6 @@ Example:
  nh.deltrap(x, y);
 
 
-
 === ing_suffix
 
 Construct a gerund (a verb formed by appending "ing" to a noun).
@@ -159,6 +185,7 @@ Example:
 
  local diff = nh.level_difficulty();
 
+
 === makeplural
 
 Pluralize the given string.
@@ -227,6 +254,14 @@ Example:
  nh.pline("Message text to show.");
 
 
+=== pushkey
+
+Push a key into the command queue.
+
+Example:
+
+ nh.pushkey("i");
+
 === random
 
 Generate a random number.
@@ -958,3 +993,13 @@ Example:
 | `"x"`     | "transparent" - used for <<_map>> parts.
 | `"w"`     | "any wall" - see <<_match>>
 |===
+
+== Constants
+
+These constants are in the `nhc` table.
+
+|===
+| COLNO | Number of map columns
+| ROWNO | Number of map rows
+| DLB   | 1 or 0, depending if NetHack is compiled with DLB
+|===