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.

c/src/lib/libcpu/sparc/syscall/syscall.h

@@ -1,4 +1,3 @@
-
 #define SYS_exit        1
 #define SYS_irqdis      2
 #define SYS_irqen       3