Fix config file

cmake/janssonConfig.cmake.in

@@ -1,17 +1,4 @@
-# - Config file for the jansson package
-# It defines the following variables
-#  JANSSON_INCLUDE_DIRS - include directories for FooBar
-#  JANSSON_LIBRARIES    - libraries to link against
-
-# Get the path of the current file.
-get_filename_component(JANSSON_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
-
-# Set the include directories.
-set(JANSSON_INCLUDE_DIRS "@JANSSON__INCLUDE_DIRS@")
-
-# Include the project Targets file, this contains definitions for IMPORTED targets.
-include(${JANSSON_CMAKE_DIR}/JanssonTargets.cmake)
-
-# IMPORTED targets from JanssonTargets.cmake
-set(JANSSON_LIBRARIES jansson)
+@PACKAGE_INIT@
 
+include("${CMAKE_CURRENT_LIST_DIR}/janssonTargets.cmake")
+check_required_components("@PROJECT_NAME@")