Add alerting and getinfo_MP

Please see notes here guys http://pastie.org/pastes/9733526/text?key=luz9fdv1whtvfhn1sjvckg

Before merging can we grab an hour to build this and run over how it works/test it out.

Thanks
Z
Basically this flag is always false (e.g. current core master), unless it's a tagged release (v0.9.3, ...), but it does unfortunally indeed interfer with the UI alert info line as well as other parts of the alert system (of Bitcoin Core).