7039937: Improved catch analysis fails to handle a common idiom in the libraries
Summary: Disable generation of 'unreachable catch' warnings for catch statements catching Exception/Throwable
Reviewed-by: jjg

6558548: The compiler needs to be aligned with clarified specification of throws
Summary: Javac should issue unconditional warnings when 'dead' catch clauses are detected
Reviewed-by: jjg