[xmlsec] New xmlsec 1.2.21 release

[Aleksey Sanin]

The new XML Security Library 1.2.21 includes the following changes:

* Added OOXML Relationships Transform Algorithm (patch from
  Miklos Vajna).

* Added experimental GOST2012 support for xmlsec-openssl (patch
  from Nikolay Shaplov).

* Migrated XMLSec to GitHub.

* Added OpenSSL 1.1.0 (pre 2) API support (major re-factoring for
  all OpenSSL based implementations of the block ciphers and the
  DSA/ECDSA signatures).

* Removed support for legacy OpenSSL 0.9.6 (last release: March, 2004)
  and 0.9.7 (last release: February, 2007).

* Completely revamped manpages/documentation build to completely
  pass 'make distcheck' tests.

* Deprecated XMLSEC_CRYPTO define in favor of xmlSecGetDefaultCrypto()
  function.

* Implemented several other smaller features; fixed several other
  minor bugs, code cleanups:

     https://github.com/lsh123/xmlsec/commits/master



You can find the new release in the usual place:

   http://www.aleksey.com/xmlsec/download.html

Thanks to everyone for contributing patches and reporting bugs!

Best,

Aleksey Sanin