Encryption patch follow-up

* PBKDF2 implementation changed to OpenSSL implementation.

* HKDF implementation moved to its own file and tests
  added to ensure correctness.

* Removed libzfs's now unnecessary dependency on libzpool
  and libicp.

* Ztest can now create and test encrypted datasets. This is
  currently disabled until issue #6526 is resolved, but
  otherwise functions as advertised.

* Several small bug fixes discovered after enabling ztest
  to run on encrypted datasets.

* Fixed coverity defects added by the encryption patch.

* Updated man pages for encrypted send / receive behavior.

* Fixed a bug where encrypted datasets could receive
  DRR_WRITE_EMBEDDED records.

* Minor code cleanups / consolidation.

Signed-off-by: Tom Caputi <tcaputi@datto.com>

COPYRIGHT

@@ -23,7 +23,17 @@ approved for release under LLNL-CODE-403049.
 
 Unless otherwise noted, all files in this distribution are released
 under the Common Development and Distribution License (CDDL).
-Exceptions are noted within the associated source files.  See the file
-OPENSOLARIS.LICENSE for more information.
+Exceptions are noted within the associated source files.  A few notable
+exceptions and their respective licenses include:
+
+Skein Checksum Implementation: module/icp/algs/skein/THIRDPARTYLICENSE
+AES Implementation: module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.gladman
+AES Implementation: module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.openssl
+PBKDF2 Implementation: lib/libzfs/THIRDPARTYLICENSE.openssl
+
+This product includes software developed by the OpenSSL Project for use
+in the OpenSSL Toolkit (http://www.openssl.org/)
+
+See the file OPENSOLARIS.LICENSE for more information.
 
 Refer to the git commit log for authoritative copyright attribution.