not necessary anymore. Seems to also prevent a a situation where at request
shutdown cursor was first dropped and tried to close it afterwards when
all the resources were not manually freed, and could occasionally segfault.
with timestamp, date and time.
Incombatible change: renamed constant IBASE_TIMESTAMP to IBASE_UNIXTIME.
Incompatible change: renamed configuration directive ibase.timeformat
to ibase.timestampformat.
Added constants IBASE_TIMESTAMP, IBASE_DATE, IBASE_TIME.
Added configuration directives ibase.dateformat and ibase.timeformat.
ibase_timefmt() now takes an optional second argument specifying which
format to change, default is IBASE_TIMESTAMP (for even a little backwards
compatibility).
