[Feature request] Implement CMAKE_Fortran_KNOWN_FEATURES
This would be the Fortran equivalent of CMAKE_C_KNOWN_FEATURES and CMAKE_CXX_KNOWN_FEATURES. Implementation should be straightforward because the relevant information has already been collected in convenient form (for 11 different Fortran compilers) at http://www.fortranplus.co.uk/app/download/23704631/fortran_2003_2008_compiler_support.pdf