Remove All CVS Id Strings Possible Using a Script

Script does what is expected and tries to do it as
smartly as possible.

+ remove occurrences of two blank comment lines
  next to each other after Id string line removed.
+ remove entire comment blocks which only exited to
  contain CVS Ids
+ If the processing left a blank line at the top of
  a file, it was removed.

doc/porting/sourcecode.t

@@ -2,9 +2,6 @@
 @c  COPYRIGHT (c) 1988-2002.
 @c  On-Line Applications Research Corporation (OAR).
 @c  All rights reserved.
-@c
-@c  $Id$
-@c
 
 @chapter Source Code Organization