+t_character+: Accept a single-character JSON string literal, copy
that character to a C +char+ location.
++t_time+" Accept a string that is an RFC3339 timestamp (full ISO-8601
+date/time in Zulu time with optional fractional decimal seconds).
+Store as a double value, seconds since Unix epoch. Accepted only
+if the code was built with -DTIME_ENABLE; introduces a dependency
+on the glibc function timegm().
+
Associated with each simple value type's storage (in the +addr+
union) is a correspondingly-named field in the +dflt+ union).
This is a default value which is copied to the target storage