X11: set all selectable menu lines to the same length, left justified
X11: initializing the get-extended-command widget modified memory beyond what
it dynamically allocated
+sounds: add a soundlib interface that consists of a specification
+ documented in doc/sound.txt; default 'nosound' soundlib implementation
+ of the specification in src/sounds.c
+sounds: added soundlib_macsound implementation for use on macOS; the
+ interface implementation resides in the objective C file
+ sound/macsound/macsound.m; built on top of the built-in AppKit
+ NSSound, #import <AppKit/AppKit.h>, linked using -framework AppKit.
+sounds: added 'windsound' soundlib implementation for use on Windows; the
+ interface implementation resides in the file
+ sound/windsound/windsound.c; built on top of the win32 api,
+ header file mmsystem.h, linked with winmm.
+sounds: add 'qtsound' soundlib implementation for use on any platform
+ with Qt; the interface implementation resides win/Qt/qt_bind.cpp;
+ built on top of Qt.
General New Features