p0f using old version of API

[xambroz]

The API used to talk to the p0f daemon listening on a local socket is meant for the version 2.+.
Trying to use dionaea with the p0f versions 3.+ ends with severe errors and crashdumps.
For example during a connection to a port handled by the blackhole handler, whole dionaea crashes with the segmentation fault.

Please migrate the API interface to version 3.