Version 2018 R4: Sorting support in EWS and new OpenSSH keys with AES-CTR

This is mostly a maintenance release with enhancements and bugfixes, but it adds some new features as well:

Password and key authentication in File Server

Support for authentication with both password and public key was added to Rebex File Server.

Support for yet another OpenSSH key encryption

Added support for new OpenSSH keys with AES-CTR encryption.

Sorting support in EWS

Added overloads of Ews object's GetMessageList/GetItemList/Search/SearchItems
that make it possible to specify desired sorting order.

Password-hiding in Verbose logging mode

There is no need to manually remove credentials from verbose logs now.

And more...

For a complete list of changes see the release history.