Merge pull request #33 from green525/master

Align legend with brightening
Fix config backward compatibility
Fix graph sizing, improve config

Use full-size-graph option in recent RRDTool versions to avoid scaled
graphs. Introduce config defaults file to avoid hairy isset() logic for
new options. Make graph sizes configurable.
wait for children before exit; avoid a 'socket already used' issue on restart;
store peer-as in /peeras/* (only for sFlow)
add a filter in find, so it will count as OR peeras, not both of them (same tree..)
fix help info to add the 'n' switch
Revert "fix help info to add the 'n' switch"

This reverts commit c67e0bc0d9b5f53545a9c087126a7c2fa34dd9de.
Revert "add a filter in find, so it will count as OR peeras, not both of them (same tree..)"

This reverts commit 7920698595fa2447ec38b6f0d0dd70a9e1105c17.
Revert "store peer-as in /peeras/* (only for sFlow)"

This reverts commit 4662f2f75dab181ce05bfb60bc903704dab88b15.
Revert "wait for children before exit; avoid a 'socket already used' issue on restart;"

This reverts commit 86ddfe44b48afd55f741c6bcce91a2e5627d80a4.
add a filter in find, so it won't look for deeper sub-tree (another "rrd-tree" stored in the same root)
wait for children before exit; avoid a 'socket already used' issue on restart;
add the forgotten 'type' in recursive handflow()
fix title for v6 linkusage
add function to generate images html
add function to generate images html
use getHTML* function
use getHTML* function
store peer-as data