* Added a 'GROUPS.DEFAULT_CUT_LIFE' field to the database.
* Incremented the database version to 269.
* Added 'RDGroup::defaultCutLife()' and 'RDGroup::setDefaultCutLife()'
methods.
* Added a 'Set End Date/Time' control to the 'Edit Group' dialog in
RDAdmin(1).
* Modified the Edit Log screen in 'rdlogedit/edit_log.cpp' to
display the link Start Time and Length for Traffic and Music links
in the 'EXT DATA' column.
* Removed display of the link Length for Traffic and Music links
from the LENGTH column in 'rdlogedit/edit_log.cpp'.