* make top N AS intervals configurable (see config.inc), and allow
separate top stats file to be used per interval (enables e.g. proper
weekly/monthly stats)
* add Terabyte formatting
Fix command line injection. Make number of hours in top.php a parameter
instead of duplicating file. Add config setting for compatibility with
old (< 1.3) RRDtool versions. Move contributed shell scripts to subdir.