different values.

unimplemented 'unix' type

'controls' statement is a map with the clauses 'inet' and 'unix'

avoid infinite loop when parsing a bad ACL element

called 'value', not 'acl'; rationalized representation of key references and
debug levels

primitive type

string types; added cfg_obj_is*() functions for determining the type of a configuration object;
reordered some functions in parser.c