message: Add description of the module
diff: #
  +# Finds and exposes libraries, include dirs, compiler flags, etc. for ODBC implementations (referred as "providers"),
  +# as well as defines imported interface libraries that bring the required config for driver or application linkage.
  +# Delegates the main job of detection to corresponding sub-Find* modules: UnixODBC, iODBC, and MDAC.
  +#
  # Consults the following vars (if set):
  # ODBC_PROVIDER - one of UnixODBC, iODBC, or MDAC
  #
  