major rework of ghc packaging: particularly prof and doc subpackages
    
    - bump release to 99
    - drop ghc-doc-index script and cronjob
    - lock compiler to ghc-base-devel verrel
    - switch from %without_prof to %with_ghc_prof
    - split docs bcond to %with_haddock and %with_manual
    - disable debuginfo for quickbuild
    - BR ghc-rpm-macros 2.0 and make
    - allow python2-sphinx for current fedora releases
    - lighten ghc: only suggest ghc-doc, ghc-doc-index, ghc-manual, ghc-prof
    - drop support for rhel6 builds
    - use %ghc_set_gcc_flags
    - remove alternatives
    - filetriggers for haddock index updating
    
    - in future we might separate static devel subpackages too (if cabal
      can handle vanilla or dyn only)