[xmlsec] xmlsec 1.2.26-rc1

[Aleksey Sanin]

The XML Security Library 1.2.26 release candidate 1 is published
in the usual place:

https://www.aleksey.com/xmlsec/download/xmlsec1-1.2.26-rc1.tar.gz
https://www.aleksey.com/xmlsec/download/xmlsec1-1.2.26-rc1.sig

This release includes the following changes:
* Added xmlsec-mscng module based on Microsoft Cryptography API: Next
Generation (vmiklos).
* Added support for GOST 2012 and fixed of CryptoPro CSP provider in
xmlsec-mscrypto (ipechorin).
* Added LibreSSL 2.7 support (vishwin).
* Upgraded documentation build process to support the latest gtk-doc.
* Several other small fixes


Please take a look and let me know if there are any issues.
If everything goes well I plan to publish the release on June 5th.

Best,