Cast normal pointers to array of strings to constant and in one case to void**.
Casts between menu*_s are valid, because each of them embeds menucommon_s
as first member there's type tag in that generic struct, and every
relevant function checks tag value before aborting or casting and doing
anything else.
Plus missing function declaration and adding const qualifiers to function
pointers that always got filled with functions with const parameters.
https://bugs.gentoo.org/881071
https://bugs.gentoo.org/921028
--- a/source/client/menu.c
+++ b/source/client/menu.c
@@ -3606,7 +3606,7 @@
 	s_servers[serverindex].serverinfo_columns[0][1].generic.type		= MTYPE_TEXT;
 	s_servers[serverindex].serverinfo_columns[0][1].generic.flags	= QMF_RIGHT_COLUMN;
 	
-	Menu_MakeTable (&s_servers[serverindex].serverinfo_table, 7, 2, sizes, s_servers[serverindex].serverinfo_rows, s_servers[serverindex].serverinfo_rows, s_servers[serverindex].serverinfo_columns, contents);
+	Menu_MakeTable (&s_servers[serverindex].serverinfo_table, 7, 2, sizes, s_servers[serverindex].serverinfo_rows, s_servers[serverindex].serverinfo_rows, s_servers[serverindex].serverinfo_columns, (const char **)contents);
 	
 	Menu_AddItem (&s_servers[serverindex].serverinfo_submenu, &s_servers[serverindex].serverinfo_table);
 	
@@ -3694,7 +3694,7 @@
 						mservers[serverindex].players, SVDATA_PLAYERINFO,
 						sizes, &s_servers[serverindex].playerlist_header,
 						s_servers[serverindex].playerlist_rows, s_servers[serverindex].playerlist_columns,
-						local_player_info_ptrs
+						(const char **)local_player_info_ptrs
 					);
 	
 	Menu_AddItem (&s_servers[serverindex].playerlist_submenu, &s_servers[serverindex].playerlist_scrollingmenu);
@@ -4540,7 +4540,7 @@
 		// load info from config file if possible
 		
 		Com_sprintf (cfgpath, sizeof(cfgpath), "%s/%s.cfg", BOT_GAMEDATA, name);
-		if( FS_LoadFile (cfgpath, &cfg) == -1 )
+		if( FS_LoadFile (cfgpath, (void **)&cfg) == -1 )
 		{
 			Com_DPrintf("LoadBotInfo: failed file open: %s\n", fullpath );
 			continue;
--- a/source/client/qmenu.c
+++ b/source/client/qmenu.c
@@ -160,7 +160,7 @@
 	menu_box.width = f->generic.visible_length*font->width;
 	FNT_BoundedPrint (font, f->buffer, FNT_CMODE_QUAKE_SRS, FNT_ALIGN_LEFT, &menu_box, light_color);
 	
-	if ( cursor.menuitem == f )
+	if ( cursor.menuitem == (struct _tag_menuitem *)f )
 	{
 		if ( ( ( int ) ( Sys_Milliseconds() / 300 ) ) & 1 )
 			Draw_StretchPic (menu_box.x + menu_box.width - font->size / 8, menu_box.y-1, font->size, font->size+4, "menu/field_cursor");
@@ -172,7 +172,7 @@
 	menufield_s *f;
 	extern int keydown[];
 	
-	f = cursor.menuitem;
+	f = (menufield_s *)cursor.menuitem;
 	
 	if (f == NULL || f->generic.type != MTYPE_FIELD || key > 127)
 		return false;
@@ -968,7 +968,7 @@
 	if (menu->maxheight != 0 && CHASELINK(menu->height) > menu->maxheight && cursor.x > right)
 	{
 		// select the scrollbar
-		item = &menu->vertical_scrollbar;
+		item = (menuitem_s *)&menu->vertical_scrollbar;
 		Cursor_MouseSelectItem (item);
 	}
 	else for ( i = 0; i < menu->nitems; i++ )
@@ -1426,7 +1426,7 @@
 
 void Menu_SlideItem (int dir)
 {
-	menucommon_s *item = cursor.menuitem;
+	menucommon_s *item = (menucommon_s *)cursor.menuitem;
 	
 	if ( item )
 	{
@@ -1474,7 +1474,7 @@
 	else if ( s->curvalue < s->minvalue )
 		s->curvalue = s->minvalue;
 
-	Menu_ActivateItem (s);
+	Menu_ActivateItem ((menuitem_s *)s);
 }
 
 void Slider_Draw (menuslider_s *s, FNT_font_t font)
@@ -1531,7 +1531,7 @@
 			s->curvalue--;
 	}
 
-	Menu_ActivateItem (s);
+	Menu_ActivateItem ((menuitem_s *)s);
 }
 
 void SpinControl_Draw (menulist_s *s, FNT_font_t font)
--- a/source/game/game.h
+++ b/source/game/game.h
@@ -177,10 +177,10 @@
 	void	(*FreeTags) (int tag);
 
 	// console variable interaction
-	cvar_t	*(*cvar) (char *var_name, char *value, int flags);
-	void	(*cvar_set) (char *var_name, char *value);
-	cvar_t	*(*cvar_forceset) (char *var_name, char *value);
-	void	(*cvar_describe) (cvar_t *var, char *description_string);
+	cvar_t	*(*cvar) (const char *var_name, const char *value, int flags);
+	void	(*cvar_set) (const char *var_name, const char *value);
+	cvar_t	*(*cvar_forceset) (const char *var_name, const char *value);
+	void	(*cvar_describe) (cvar_t *var, const char *description_string);
 
 	// ClientCommand and ServerCommand parameter access
 	int		(*argc) (void);
--- a/source/qcommon/qcommon.h
+++ b/source/qcommon/qcommon.h
@@ -132,6 +132,7 @@
 void MSG_WriteByte (sizebuf_t *sb, int c);
 void MSG_WriteShort (sizebuf_t *sb, int c);
 void MSG_WriteLong (sizebuf_t *sb, int c);
+void MSG_WriteSizeInt (sizebuf_t *sb, int bytes, int c);
 void MSG_WriteFloat (sizebuf_t *sb, float f);
 void MSG_WriteString (sizebuf_t *sb, char *s);
 void MSG_WriteCoord (sizebuf_t *sb, float f);