Update versions of cgi.el and httpd.el from 3.03 prerelease

Update versions of cgi.el and httpd.el from 3.03 prerelease

* contrib/cgi.el: Fix a compiler warning introduced by sample calendar
  code.  Make this not depend on 'cl at runtime.
  (cgi-position): New function that implements a simple replacement for
  the position function found in cl-seq.el.
  (cgi-decode): Use `cgi-position' instead of `position' and `substring'
  instead of `subseq'.
  (cgi-calendar-string, cgi-calendar): Re-add these, since
  they are mentioned in the documentation.

* contrib/httpd.el (httpd-start): Update this to work with newer versions
  of Emacs.

* debian/changelog: Make the necessary changes to close #357949.
git-archimport-id: mwolson@gnu.org--2005/muse--rel--3.02--patch-64