Possible compatibility problems with earlier versions marked with '*'.
+Added feature for CCL module. Virtual structure s=al or s=ol generates
+and-list and or-list respectively instead of phrase search.
+
+Added some OID's.
+
* Added prefix "yaz_" for the functions log_init.., log_file.. and
log_mask_str. This was done to avoid name conflicts with other
libraries (say other PHP extensions).