[Ietf-calsify] Section 4.6.4 Free/Busy Component: fbprop

[Bernard Desruisseaux]

In section 4.6.4 Free/Busy Component of RFC 2445...

The rule fbprop specifies that DTSTAMP, and UID are
OPTIONAL which is in contradiction with section 4.8.7.2
Date/Time Stamp, and section 4.8.4.7 Unique Identifier
which all specify that those two properties are REQUIRED
in VFREEBUSY components.

I propose to change the beginning of "todoprop" as follows:

 >  fbprop = *(
 >
 >         ; the following are both REQUIRED,
 >         ; but MUST NOT occur more than once
 >
 >         dtstamp / uid /
 >
 >         ; the following are optional,
 >         ; but MUST NOT occur more than once
 >
 >         ...

Cheers,
Bernard