Issue reported in https://sft.its.cern.ch/jira/browse/ROOT-9043

- In SelectionRules.cxx: #define fnmatch (Unix filename pattern matching) as PathMatchSpec (MS-DOS)
- In TModuleGenerator::WriteRegistrationSource, since Visual sudio has a limitation of 2048 characters max in raw strings, split the potentially huge DICTFWDDCLS raw string into multiple smaller ones
- In rootcling_impl.cxx, implement the Windows specific mangled/demangled checks, and convert several backslashs into forward slashs

this is a requirement to allow the TInterface to get rid of move
semantics in the interface and allow PyROOT to work.

Use a EStatusBits 'enum' instead of a 'constexpr static int' (allowing automatic checking for overlaps)

Following the observation from philippe: Macro named starting with underscore are technically reserved for/by the compiler

- Add a couple of missing #include <algorithm>
- Replace _N by _NN (_N is already defined and used in some system math headers on Windows)
- Add #define __thread __declspec(thread)

- add dependencied on Core and IO (needed to resolve the symbols at link time on Windows)
- add a few symbols to be exported
- use the ANSI version of system functions
- convert the backslashs to forward slashs in the rootmap file path