Make mhn.defaults a static file and removed the scripts that built it.

[mmh] / etc / mhn.defaults

mhshow-suffix-text/html: .html
mhstore-store-application/PostScript: %m%P.ps
mhstore-store-text: %m%P.txt
mhstore-store-text/richtext: %m%P.rt
mhstore-store-video/mpeg: %m%P.mpg