The maximum number of persistent Firebird/InterBase connections per
process. New connections created with ibase_pconnect() will be non-persistent
if this number would be exceeded.
The default database to connect to when ibase_[p]connect() is called
without specifying a database name. If this value is set and SQL safe
mode is enabled, no other connections than to this database will be allowed.
These directives are used to set the date and time formats
that are used when returning dates and times from a result set,
or when binding arguments to date and time parameters.