[VCARDDAV] vCard revision - DRINK attribute

[Sly Gryphon <sgryphon at computer.org>]

Additional DRINK attribute for consideration of inclusion in vCard 4.0.

Rationale: Provide a value based on the semantics of the LDAP RFC4524
drink attribute. Technology should not be composed solely of boring
bits, name, telephone, fax, address ... so I think it would add a touch
of enjoyment by using this attribute from RFC4524 (and it can even be
included in the vCard-LDAP mapping standard as well).


DRINK

Purpose: Specifies the favorite drinks of an object (or person), for
instance, "cola" and "beer".

Value type: A single text value.

Cardinality: (0,n)

Special notes: This type is based on the semantics of the [RFC4524]
'drink' attribute.

ABNF:
   param = "VALUE=text" / language-param / pid-param / pref-param
          / any-param
    value = text

Example:
 DRINK: Cola