* new configuration options (see nagiosgraph.conf for details): stack
* added graph zooming. zooming happens in-place (no separate window).
drag to zoom. right-click to revert the graph.
* added mouseovers that display time under the cursor.
* optionally specify heartbeat, step, and resolution per host/service.
* clean up insert.pl in preparation for additional processing modes and
performance data sources.
* fix to javascript to display hosts and services when specified via CGI
even if they do not appear in the host and service menus.
* fixed bug in handling of backslashes in service and database names.
* added support for rrdtool STACK. stack can be specified using the 'stack'
directive and/or using the 'lineformat' directive. see nagiosgraph.conf
for details and examples.
PR: 149358
Submitted by: Ildar Hizbulin <hizel _at_ vyborg.ru> (maintainer)
Approved by: glarkin (mentor)
