Add Missing netatalk files

cmake/modules/FindNetatalk.cmake

@@ -0,0 +1,35 @@
+# Find Netatalk's libatalk.
+#
+# Result variables:
+#   NETATALK_FOUND
+#   NETATALK_INCLUDE_DIRS
+#   NETATALK_LIBRARIES
+#
+# Optional cache hints:
+#   NETATALK_ROOT
+#   NETATALK_INCLUDE_DIR
+#   NETATALK_LIBRARY
+
+find_path(NETATALK_INCLUDE_DIR
+    NAMES atalk/adouble.h
+    HINTS ${NETATALK_ROOT}
+    PATH_SUFFIXES include
+)
+
+find_library(NETATALK_LIBRARY
+    NAMES atalk libatalk
+    HINTS ${NETATALK_ROOT}
+    PATH_SUFFIXES lib lib64
+)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Netatalk
+    REQUIRED_VARS NETATALK_INCLUDE_DIR NETATALK_LIBRARY
+)
+
+if(NETATALK_FOUND)
+    set(NETATALK_INCLUDE_DIRS ${NETATALK_INCLUDE_DIR})
+    set(NETATALK_LIBRARIES ${NETATALK_LIBRARY})
+endif()
+
+mark_as_advanced(NETATALK_INCLUDE_DIR NETATALK_LIBRARY)