Support for VHDX

[uroni]

Server 2.5.21/Client 2.5.15

New settings handling The major change with server 2.5.x and client 2.5.x is a complete redesign how settings are handled. The goal is to make it more explicit and consistent. Each setting has a button next to it which switches between inheriting the setting from the group, using the configuration value on the configuration page and using the value from the client, and for some setting merging client and server settings together File backup paths are now a normal setting just like any other. …