rrdstats: Collect and graph temperature data, thx lemmy
 * some devices (eg 7320) does not show graph on avm-webif, but value is readable
 * todo: fix FREETZ_AVM_HAS_TEMPERATURE_SENSOR (check with: {{{ctlmgr_ctl r power status/act_temperature}}})
(refs #2127)

 


git-svn-id: file:///var/svn/freetz/trunk@10741 149334a1-2f27-0410-a3b9-fc62619ac1e6