djgpp port: sound blaster support, lifted from libmikmod.
djgpp port: build for pentium by default, add -fomit-frame-pointer and -ffast-math to CFLAGS. minor README update.
djgpp port: move dos sources to GPLv3+ for consistency (formerly was GPLv2+.)
Merge branch 'wildmidi-djgpp'
change OSS support to no longer use mmap mode for better compatibility.