Updated v1.5.8a packages for MorphOS, AROS, and AmigaOS

Rebuilt and re-uploaded the MorphOS, AmigaOS and AROS packages to
fix a few AHI and joystick issues. The packages have "1.5.8a" as
the version number.
http://sourceforge.net/projects/uhexen2/files/Hammer%20of%20Thyrion/1.5.8/MorphOS/
http://sourceforge.net/projects/uhexen2/files/Hammer%20of%20Thyrion/1.5.8/AmigaOS-m68k/
http://sourceforge.net/projects/uhexen2/files/Hammer%20of%20Thyrion/1.5.8/AROS-x86/

Also rebuilt and re-uploaded the corresponding demo version packages:
http://sourceforge.net/projects/uhexen2/files/Hexen2Demo-Aug.1997/

For those who build from the source code, apply the 1.5.8a patch to
the original 1.5.8 source:
http://sourceforge.net/projects/uhexen2/files/Hammer%20of%20Thyrion/1.5.8/Source/

The changes are as follows:

• sound (AHI backend): fix sample rates lower than 11025 Hz.
• sound (AHI backend): fix bad sound with sample rates which are
  not a multiple of 11025.
• input: limit lowlevel.library joystick ports to 0-3.
• opengl (amigaos3, MiniGL): smart and automatic locking support.
  new cvar gl_lockmode, valid values: "manual" (default), "auto",
  and "smart".