Implement support to fuzzyHash operator into libmodsecurity

[zimmerle]

Operator fuzzyHash needs to be implemented inside libmodsecurity.

The documentation of the operator can be found here:
https://github.com/SpiderLabs/ModSecurity/wiki/Reference-Manual#fuzzyHash

The file already exist in the repository:
https://github.com/SpiderLabs/ModSecurity/blob/libmodsecurity/src/operators/fuzzy_hash.cc

[zimmerle]

fully implemented at: a9d54c3