Technical notes on version 2.3
General:
+06Jan08
+ebl Fixes #1034 which cause mysql to hang the connection after 8h
+ebl Change default statistics target of filename.name and path.path
+ fields for PostgreSQL. This speeds lookup by indexes. Thanks
+ to Marc Cousin.
+kes A few more tweaks to new reservation code. Make sure to clear
+ vol released flag when retaking volume. When reading label and
+ label is bad mark volume unused. When recycling, mark volume
+ unused so it can be renamed.
05Jan08
kes Fix reserve_volume() so it doesn't release a volume in use
(i.e. a volume entry not marked released). This should be