Commit Briefs
all: remove $OBJTYPE from build
Now that we assume pthreads, the only assembly left is in libmp and libsec. We only ever added assembly for 386. The portable C code is fine for plan9port.
build: use installbsd instead of install on AIX
Even in mkmk.sh.
src: mv ../buildEnvironmentVariables mkhdr
Also note that the file must be valid shell and mk input. For #321.