Possible compatibility problems with earlier versions marked with '*'.
-yaz.m4 now configure option --with-yazconfig renamed to
---with-yaz-config (note extra dash).
+Macro YAZ_INIT in yaz.m4: option --with-yazconfig renamed to --with-yaz.
Added CCL utility ccl_qual_line which adds CCL qualifier line consisting
of name and value - ignoring empty lines and comments.