show MA MTU
warn if setting too large caplen
scroll to change caplen
stat as early as possible
refactor: move to function
refactor: simplify statement
refactor: move cache code to function
show which user is running webserver
refactor: make graph class
Adding more settings for graphs.

* Default size and aspect
* Default timespans
* Age
Set caching headers
Using internal cache directory instead of /tmp
not showing dropped or BU for mp-0.7.10 where the data isn't available.
Merge branch 'selective_graph'