smokeping.fcgi exits prematurely if a non-existent section is requested

[themsley-voiceflex]

If an http request is made to smokeping that requests a non-existent section then the process exits with a 500 error and has to be respawned. In our environment with 170GB RRDs in 85,000 files that is an expensive operation. Following patch changes die to warn and returns to the caller rather than dying a horrible death.
smokeping-2.8.2-prevent-500-error.PATCH