Expand the Id keyword.

tools/check-compat.sh

@@ -1,4 +1,4 @@
-# $Id: check-compat.sh,v 1.1 2010-10-24 00:42:04 tcunha Exp $
+# $Id$
 
 grep "#include" compat.h|while read line; do
      grep "$line" *.[ch] compat/*.[ch]

tools/cmp-cvs.sh

@@ -1,4 +1,4 @@
-# $Id: cmp-cvs.sh,v 1.2 2009-06-25 16:54:21 nicm Exp $
+# $Id$
 
 rm diff.out
 touch diff.out

tools/fix-ids.sh

@@ -1,4 +1,4 @@
-# $Id: fix-ids.sh,v 1.3 2009-07-01 19:03:34 nicm Exp $
+# $Id$
 
 for i in *.[ch] tmux.1; do
     (head -1 $i|grep '$OpenBSD' >/dev/null) || continue