* Update magic implementation from openbsd to 0e59d0d commit
* Various refactoring of the original code to use RzUtil primitives instead of the custom implementation
* Remove static variables from the original code
* Remove Queue, regex_t and use RzList, RzRegex instead
* Remove unneeded code from the original implementation
* Use RZ_LOG_* macroses instead of the custom logging of the original code
* Use rz_endian primitives where appropriate
* Use os-specific functions where appropriate
* Move magic functions to internal header
