[PATCH perl-modes] Sync cperl-mode with upstream 5.23

[Ville Skyttä]

I've synced cperl-mode with upstream 5.23, appears to work fine here (and has 
much faster syntax highlighting than earlier versions).  The diff is about 
220kB uncompressed, so attached is a gzipped version.

The vast majority of XEmacs customizations have been integrated upstream, and 
I reverted some cosmetic "RMS Emacs" -> "Emacs" changes because the former is 
the way upstream appears to want it spelled, and following that makes future 
syncs easier.

I intend to commit early next week unless there are objections.

2007-05-27  Ville Skyttä  <scop at xemacs.org>

	* cperl-mode.el: Sync with upstream version 5.23.
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