* asn1-parse.y (yyparse): Prefix with _ksba_asn1_.
* asn1-func.c (_asn1_find_left): Made static.
* dn.c (parse_rdn): Add a parse-only mode to determine the end os
a part.
(_ksba_dn_from_str): Parse the string in revereted order as
specified by rfc2253.