Things-to-keep:
3b1.mh
-altos.mh
-altosgas.mh
-amix.mh
-apollo68v.mh
-arm.mh
-bigmips.mh
-convex.mh
-decstation.mh
-delta88.mh
-hp300bsd.mh
-hp300hpux.mh
-i386mach.mh
-i386sco.mh
-i386v.mh
-i386v4.mh
-i386v-g.mh
-i386v32.mh
-i386v32-g.mh
-irix3.mh
-irix4.mh
-isi.mh
-littlemips.mh
-m88k.mh
-merlin.mh
-news.mh
-news1000.mh
-none.mh
-np1.mh
-pn.mh
-pyramid.mh
-rs6000.mh
-rtbsd.mh
-stratus.mh
-sun2os3.mh
-sun2os4.mh
-sun3.mh
-sun386.mh
-sun3os3.mh
-sun3os4.mh
-sun4.mh
-sun4os3.mh
-sun4os4.mh
-sun4os5.mh
-symmetry.mh
-tahoe.mh
-ultra3.mh
-umax.mh
-vaxbsd.mh
-vaxult.mh
3b1.mt
-a29k.mt
a29k-kern.mt
+a29k.mt
+altos.mh
altos.mt
+altosgas.mh
altosgas.mt
+amix.mh
amix.mt
+apollo68v.mh
+arm.mh
arm.mt
+bigmips.mh
bigmips.mt
+convex.mh
convex.mt
+decstation.mh
decstation.mt
+delta88.mh
delta88.mt
h8300hms.mt
+hp300bsd.mh
hp300bsd.mt
+hp300hpux.mh
hp300hpux.mt
-i386sco.mt
i386aout.mt
-i386v.mt
-i386v4.mt
+i386mach.mh
+i386sco.mh
+i386sco.mt
+i386v-g.mh
i386v-g.mt
-i386v32.mt
+i386v.mh
+i386v.mt
+i386v32-g.mh
i386v32-g.mt
+i386v32.mh
+i386v32.mt
+i386v4.mh
+i386v4.mt
i960.mt
+irix3.mh
irix3.mt
+irix4.mh
+isi.mh
isi.mt
+littlemips.mh
littlemips.mt
+m88k.mh
m88k.mt
+merlin.mh
merlin.mt
+news.mh
news.mt
+news1000.mh
news1000.mt
nindy960.mt
+none.mh
none.mt
+np1.mh
np1.mt
os68k.mt
+pn.mh
pn.mt
+pyramid.mh
pyramid.mt
+rs6000.mh
rs6000.mt
+rtbsd.mh
+stratus.mh
stratus.mt
+sun2os3.mh
sun2os3.mt
+sun2os4.mh
sun2os4.mt
+sun3.mh
sun3.mt
+sun386.mh
sun386.mt
+sun3os3.mh
sun3os3.mt
+sun3os4.mh
sun3os4.mt
+sun4.mh
sun4.mt
+sun4os3.mh
sun4os3.mt
+sun4os4.mh
sun4os4.mt
+sun4os5.mh
sun4os5.mt
+symmetry.mh
symmetry.mt
+tahoe.mh
tahoe.mt
+ultra3.mh
ultra3.mt
+umax.mh
umax.mt
vax.mt
+vaxbsd.mh
+vaxult.mh
vxworks68.mt
vxworks960.mt