restore 'Portions of this code' notice

(cherry picked from commit a299dbc566)

COPYRIGHT

@@ -13,6 +13,10 @@ LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 PERFORMANCE OF THIS SOFTWARE.
 
+	Portions of this code release fall under one or more of the
+	following Copyright notices.  Please see individual source
+	files for details.
+
 	For binary releases also see: OpenSSL-LICENSE.
 
 Copyright (C) 1996-2001  Nominum, Inc.

util/update_copyrights

@@ -354,6 +354,7 @@ foreach $file (keys %file_types) {
                         $/ = "";            # paragraph at a time
                         while (<SOURCE>) {
                                 # Not very maintainable, but ok enough for now.
+				last if /Portions of this code/;
                                 last unless
                                   /[Cc]opyright/ ||
                                   /See COPYRIGHT in the source root/ ||