WebDAV: Create custom ACL backend
TElWebDAVPrincipalBackend is an abstract class that allows to store, retrieve and manage principals and groups. Depending on its implementation the data may be stored in memory, database, file system etc. . For in-memory storage SecureBlackbox includes TElWebDAVPrincipalMemoryBackend class.
One should create a descendant class of TElWebDAVPrincipalBackend and implement its methods depending on the data storage mechanism.
This mechanism is possible in .NET, Java, C++ and VCL editions. It's not possible in C++ and PHP editions.