[xmlsec] New xmlsec 1.2.28 release

[Aleksey Sanin]

The XML Security Library 1.2.28 release includes the following changes:

* Added BoringSSL support (chenbd).
* Added gnutls-3.6.x support (alonbl).
* Added DSA and ECDSA key size getter for MSCNG (vmiklos).
* Added --enable-mans configuration option (alonbl).
* Added coninuous build integration for MacOSX (vmiklos).
* Several other small fixes:
	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 who contributed patches and filed bugs!


Best,

Aleksey Sanin