** (normally, a decimal point appears in the results of those
** conversions only if a digit follows). For g and G
** conversions, trailing zeros are not removed from the result as
-** they would otherwise be.
+** they would otherwise be. For C conversions, if the
+** destination is local and the origin is a user, the
+** nick!user@host form is used.
**
** 0 specifying zero padding. For all conversions except n, the
** converted value is padded on the left with zeros rather than
** produced by a signed conversion. A + overrides a space if
** both are used.
**
+** : specifying that a struct Client name should be preceded by a
+** ':' character if the destination is a user
+**
** * An optional decimal digit string specifying a minimum field
** width. If the converted value has fewer characters than the
** field width, it will be padded with spaces on the left (or right,
** is printed; otherwise, the client's network numeric is
** printed.
**
+** H The channel argument identifier (channel name) is
+** printed.
+**
** v The argument given must be a pointer to a struct
** VarData with vd_format and vd_args must be initialized
** appropriately. On return, vd_chars will contain the