Integrate work by Raif S. Naffah (raif@fl.net.au)
	* java/security/DummyKeyPairGenerator.java (clone): New method.
	* java/security/DummyMessageDigest.java (clone): New method.
	(engineUpdate): Now public.
	(engineReset): Likewise.
	(engineDigest): Likewise.
	(engineGetDigestLength): New method.
	* java/security/DummySignature.java (clone): New method.
	* java/security/KeyPairGenerator.java (provider): Now package private.
	(getInstance(String)): Use getInstance(String,Provider).
	(getInstance(String,String): Use getInstance(String,Provider)
	(getInstance(String,Provider): New method.
	(getInstance(String,String,Provider): Don't cast DummyKeyPairGenerator.
	* java/security/KeyPairGeneratorSpi.java (clone): New method.
	* java/security/MessageDigest.java (provider): Now package private.
	(getInstance(String): Use getInstance(String,Provider).
	(getInstance(String,String): Use getInstance(String,Provider)
	(getInstance(String,Provider): New method.
	* java/security/Provider.java (toCanonicalKey): New method.
	(get): New method that uses toCanonicalKey().
	(put): Use toCanonicalKey().
	(remove): Likewise.
	* java/security/Security.java (insertProviderAt): Provider index is one
	based, not zero based.
	(addProvider): Likewise.
	(removeProvider): Likewise.
	* java/security/Signature.java (provider): Now package private.
	(getInstance(String)): Use getInstance(String,Provider).
	(getInstance(String,String): Use getInstance(String,Provider)
	(getInstance(String,Provider): New method.
	(getInstance(String,String,Provider): Don't cast DummySignature.

From-SVN: r59179