[$] Authentication and authorization in Samba4

Volker Lendecke is one of the first contributors to Samba,having submitted his first patches in 1994. In addition to developingother important file-sharing tools, he's heavily involved in development ofthe winbind service, which is implemented in winbindd. Although the core Active Directory (AD) domain controller(DC) code was written by his colleague Stefan Metzmacher, winbind is acrucial component of Samba's AD functionality. In his information-packed talk at FOSDEM2018, Lendecke said he aimed to give a high-level overview of what AD and Samba authentication is, and in particular thecommunication pathways and trust relationships between the parts ofSamba that authenticate a Samba user in an AD environment.