(ps-generate-string-list): Function deleted.

(ps-generate-string-list): Function deleted.
(ps-rh-cache, ps-lf-cache, ps-rf-cache): Variables deleted.
(ps-header-footer-string): Function deleted.
(ps-encode-header-string-function): New variable
(ps-generate-header-line): Call ps-encode-header-string-function.
(ps-basic-plot-string-function): New variable
(ps-begin-job): Set ps-basic-plot-string-function and
ps-encode-header-string-function.  For setting up headers and
footers, don't use caches such as ps-rh-cache.  Don't call
ps-mule-begin-page.
(ps-basic-plot-str): Don't call ps-mule-prepare-ascii-font.
(ps-basic-plot-string): Likewise.
(ps-control-character): Likewise.
(ps-plot-region): Don't pay attention to composition and
non-ASCII characters.
(ps-generate): Call ps-mule-end-job.
(ps-mule-prepare-ascii-font): Delete autoload.
(ps-mule-set-ascii-font): Likewise.
(ps-mule-plot-string): Likewise.
(ps-mule-begin-page): Likewise.
(ps-mule-end-job): Declare autoload.