Comment # 2 on bug 52791 from Patrick Ohly

Implemented and released in 1.4.99.4.

Use "raw/text/vcard" or "raw/text/calendar" to select storing contacts and
calendar items as sent by the peer. No other formats currently have "raw"
flavors, although adding them would be simple.

See 626e027d3d8, "datatypes: raw text items with minimal conversion".