(TODO) collect all all already implemented ones

by RFC

RFC	Description	Supported
4791#5.2.5	CALDAV:max-resource-size Property	>= 3.5.10
4791#5.3.2.1	Additional Preconditions for PUT, COPY, and MOVE related to CALDAV:max-resource-size Property (1)	>= 3.5.10
6352#6.2.2	CARDDAV:supported-address-data Property	>= 3.5.11

(1) only for PUT, COPY support missing at all and MOVE is only inside the system