Support for os.name Capability is missing for Windows Server 2019

Bundles with native libraries fail to run on Windows Server 2019

As of OpenJDK-11.0.3, oracle-JDK8u222 and OpenJDK8u212 the windows server operating system is now reported correctly as "Windows Server 2019".  However the NativeLibraryClause class in the felix-framework doesn't understand this value and as such it reverts the os.name capability to simply win32.

Please can you extend the NativeLibraryClause to cope with the new operation system name. like you have done for all the other Windows variants.

This has been seen as a problem on version 5.6.10 of the felix.framework (as shipped with glassfish 5.1), but is also present in the current code base.