* doc/ref-recording.xml: document SQL I/O recording.
* doc/ref-prepared.xml: new file for documenting prepared statements.
* doc/clsql.xml: comment out include for large object and CLSQL-SYS
* doc/ref-recording.xml: document SQL I/O recording.
* doc/ref-prepared.xml: new file for documenting prepared statements.
* doc/clsql.xml: comment out include for large object and CLSQL-SYS