(cp-coding-system-for-codepage-1):

(cp-coding-system-for-codepage-1):
Create separate encoders and decoders, for DOS and Unix.  Make the
usual family of 3 coding systems, so that automatic detection of
EOL type works.
(cp-make-coding-systems-for-codepage): Don't intern DOS- and
Unix-specific symbols here, and don't call
cp-coding-system-for-codepage-1 twice.  (Suggested by Ken'ichi
Handa <handa@etl.go.jp>.)