Accessibility: option to prevent status line updates

Apparently some screen readers keep reading the status lines
at the bottom of the screen when parts of those change.
Add an option to prevent updates to those lines.

doc/Guidebook.mn

@@ -2859,6 +2859,8 @@ Boldface monsters and ``\fB--More--\fP'' (default off).  Persistent.
 .lp statushilites
 Enable coloring of status fields (default off).
 See ``Configuring Status Hilites'' for further information.
+.lp status_updates
+Allow updates to the status lines at the bottom of the screen (default true).
 .lp suppress_alert
 This option may be set to a NetHack version level to suppress
 alert notification messages about feature changes for that
@@ -3707,6 +3709,10 @@ was interrupted.
 .lp whatis_coord:compass
 When targeting with cursor, describe the cursor position with coordinates
 relative to your character.
+.lp nostatus_updates
+Prevent updates to the status lines at the bottom of the screen, if
+your screen-reader reads those lines. The same information can be
+seen via the #attributes command.
 .hn 2
 Global Configuration for System Administrators
 .pg

doc/Guidebook.tex

@@ -3479,6 +3479,9 @@ Boldface monsters and ``{\tt --More--}'' (default off).  Persistent.
 Enable coloring of status fields (default off).
 See ``{\it Configuring Status Hilites\/}'' for further information.
 %.lp
+\item[\ib{status\verb+_+updates}]
+Allow updates to the status lines at the bottom of the screen (default true).
+%.lp
 \item[\ib{suppress\verb+_+alert}]
 This option may be set to a NetHack version level to suppress
 alert notification messages about feature changes for that 
@@ -4509,6 +4512,11 @@ was interrupted.
 \item[\ib{whatis\verb+_+coord:compass}]
 When targeting with cursor, describe the cursor position with coordinates
 relative to your character.
+%.lp
+\item[\ib{nostatus\verb+_+updates}]
+Prevent updates to the status lines at the bottom of the screen, if
+your screen-reader reads those lines. The same information can be
+seen via the #attributes command.
 \elist
 
 %.hn2

doc/fixes36.1

@@ -365,6 +365,7 @@ some death by the-poison-was-deadly situations left stale non-zero HP shown
 when sitting at a trap spot: You sit down. You step on a level teleporter.
 	(likewise for polymorph trap, and similar issue for web)
 show all statusline information in #attributes
+add option status_updates to prevent bottom of screen status line updates
 
 
 Fixes to Post-3.6.0 Problems that Were Exposed Via git Repository

include/flag.h

@@ -232,6 +232,7 @@ struct instance_flags {
     boolean echo;             /* 1 to echo characters */
     boolean use_menu_color;       /* use color in menus; only if wc_color */
     boolean use_status_hilites;   /* use color in status line */
+    boolean status_updates;   /* allow updates to bottom status lines */
     boolean use_background_glyph; /* use background glyph when appropriate */
     boolean hilite_pile;          /* mark piles of objects with a hilite */
     boolean autodescribe;     /* autodescribe mode in getpos() */

src/botl.c

@@ -213,7 +213,7 @@ bot2()
 void
 bot()
 {
-    if (youmonst.data) {
+    if (youmonst.data && iflags.status_updates) {
         bot1();
         bot2();
     }
@@ -436,7 +436,7 @@ bot()
 
     if (!blinit)
         panic("bot before init.");
-    if (!youmonst.data) {
+    if (!youmonst.data || !iflags.status_updates) {
         context.botl = context.botlx = 0;
         update_all = FALSE;
         return;

src/options.c

@@ -208,6 +208,7 @@ static struct Bool_Opt {
 #else
     { "statushilites", &iflags.use_status_hilites, FALSE, DISP_IN_GAME },
 #endif
+    { "status_updates", &iflags.status_updates, TRUE, DISP_IN_GAME },
     { "tiled_map", &iflags.wc_tiled_map, PREFER_TILED, DISP_IN_GAME }, /*WC*/
     { "time", &flags.time, FALSE, SET_IN_GAME },
 #ifdef TIMED_DELAY