(ps-end-job): Bind case-fold-search only after

(ps-end-job): Bind case-fold-search only after
switching to ps-spool-buffer.

Line number font customization.  PostScript: Lines and
PageCount are initialized on each page.  Doc Fix.
(ps-print-version): New version number (6.3.2).
(ps-lpr-switches, ps-font-info-database, ps-font-size)
(ps-header-font-size, ps-header-title-font-size, ps-left-header)
(ps-right-header): Customization fix.
(ps-setup, ps-select-font, ps-begin-file, ps-header-sheet, ps-end-job):
Fix code.
(ps-end-with-control-d, ps-line-number-font, ps-line-number-font-size):
New vars.