7044486: open jdk repos have files with incorrect copyright headers, which can end up in src bundles
Reviewed-by: ohair, trims

6934356: Vector.writeObject() serialization may deadlock
Summary: No longer synchronize on self while writing other objects.
Reviewed-by: alanb, forax, mduigou, peterjones
Contributed-by: Neil Richards <neil.richards@ngmr.net>