Use CMAKE_INSTALL_SYSCONFDIR instead of /etc

CMakeLists.txt

@@ -4,6 +4,8 @@ project(mirall)
 set(PACKAGE "mirall")
 set( CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/modules )
 include(${CMAKE_SOURCE_DIR}/VERSION.cmake)
+include(GNUInstallDirs)
+
 
 find_package(Qt4 4.4.3 COMPONENTS QtCore QtGui QtXml QtNetwork QtTest REQUIRED )
 find_package(Csync)
@@ -55,6 +57,6 @@ set(TRANSLATIONS ${CMAKE_SOURCE_DIR}/translations/mirall_de.ts)
 add_subdirectory(src)
 # add_subdirectory(test)
 
-install( FILES exclude.lst DESTINATION /etc )
+install( FILES exclude.lst DESTINATION ${CMAKE_INSTALL_SYSCONFDIR})