[xmlsec] xmlsec 1.2.28-rc1

[Aleksey Sanin]

The XML Security Library 1.2.28 release candidate 1 is published
in the usual place:

https://www.aleksey.com/xmlsec/download/xmlsec1-1.2.28-rc1.tar.gz
https://www.aleksey.com/xmlsec/download/xmlsec1-1.2.28-rc1.sig

This release includes the following changes:

* Added BoringSSL support (chenbd).
* Added gnutls-3.6.x support (alonbl).
* Added DSA EDCSA 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)

Please take a look and let me know if there are any issues. If
everything goes well I plan to publish the release on April 16.

Best,

Aleksey