Kfsio lib: possible graceful shutdown fix issue connection error an connection add attempt in case if net manager is in the process of shutting down.
Merge branch 'master' into topic/krb
Meta server: fix authentication context parameter setting. Do not start meta server if authentication context set parameters fails. Implement authentication negotiations on the meta server side.
Kfio lib: fix client authentication context set parameters, create PSK ssl context in case if Kerberos context or X509 context are initialized.
Test scripts: add script to create X509 certificates and private keys signed by the common CA authority. The script is mainly intended for unit testing.