Log Message:
Updated to latest stable release. Added dependencies required during configure.
Added dependencies which are linked to buildlink3.mk. Removed glu from
buildlink3.mk, as the resulting library doesn't link to it. patches/patch-{a,b}
were commited upstream - removed. Added patch to fix usb.h include on NetBSD.

From NEWS:
    * Tons of bug fixes
    * Added deprecated, but working Joystick API.
    * Added new constant GLUT_INIT_STATE for glutGet() to check if freeglut is
      already initialized.
    * Added new API entry for full-screen mode
        void glutFullScreenToggle( void );
      with a related new constant GLUT_FULL_SCREEN for glutGet().
    * Added new API entry to de-initialize freeglut:
        void glutExit( void );
    * Added more special keys: GLUT_KEY_NUM_LOCK, GLUT_KEY_BEGIN GLUT_KEY_DELETE
    * Added support for windows without captions and/or borders via two new
      constants GLUT_CAPTIONLESS and GLUT_BORDERLESS for glutInitDisplayMode
      (currently works for Windows only).
    * Added support for multisampling: The number of samples per pixel to use
      when GLUT_MULTISAMPLE is specified in glutInitDisplayMode() can be set via
      glutSetOption() with parameter GLUT_MULTISAMPLE now. glutGet() with the
      same token retrieves that value. The possible number of samples per pixels
      can be queried via the new API entry
        int *glutGetModeValues( GLenum mode, int *size );
      with mode GLUT_MULTISAMPLE. (glutGetModeValues() currently only works for
      X11)
    * Added new constant GLUT_AUX for glutSetOption() to set the number of
      auxiliary buffers. The possible number of auxiliary buffers can be
      queried via glutGetModeValues with mode GLUT_AUX.
    * Added support for versioned (i.e. 3.0) OpenGL contexts: New API entries
        void glutInitContextVersion( int majorVersion, int minorVersion );
        void glutInitContextFlags( int flags );
      with related new constants GLUT_DEBUG and GLUT_FORWARD_COMPATIBLE for
      the latter API entry. Added new constants GLUT_INIT_MAJOR_VERSION,
      GLUT_INIT_MINOR_VERSION and GLUT_INIT_FLAGS  for glutGet().