This function configures the CCL query parser for a
target with definitions of access points (CCL qualifiers) and
their mapping to RPN. To map a specific CCL query to RPN
afterwards call the yaz_ccl_parse() function. Each index
of the array config is the
name of a CCL field and the corresponding value holds a
string that specifies a mapping to RPN. The mapping is a
sequence of attribute-type, attribute-value pairs.
Attribute-type and attribute-value is separated by an equal
sign (=). Each pair is separated by
white space.