Creates a new DB connection object and connect to the specified
database
Parameter
string
$dsn
Data Source Name. See the
"DSN" section
for further information.
boolean
$options
If $options is TRUE the
connection will be persistent
(requires support by database driver).
Default is FALSE. In future releases, this parameter
will be an array
and take different options depending on the database.
Return value
object - the created DB connection object,
or a DB_Error object on error.
