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.

tools/build/cklength.c

@@ -8,8 +8,6 @@
  *  usage:  cklength  [ -v ] [ arg ... ] files...
  *           -l length   -- maximum line length
  *           -v          -- verbose
- *
- * $Id$
  */
 
 #define GETOPTARGS "l:nNv"