Fixed header dependencies and copyrights
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index d5e5df8..13dba2e 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -841,6 +841,20 @@
src/cpp/common/create_auth_context.h \
src/cpp/server/dynamic_thread_pool.h \
src/cpp/server/thread_pool_interface.h \
+include/grpc/impl/codegen/alloc.h \
+include/grpc/impl/codegen/atm.h \
+include/grpc/impl/codegen/atm_gcc_atomic.h \
+include/grpc/impl/codegen/atm_gcc_sync.h \
+include/grpc/impl/codegen/atm_win32.h \
+include/grpc/impl/codegen/log.h \
+include/grpc/impl/codegen/port_platform.h \
+include/grpc/impl/codegen/slice.h \
+include/grpc/impl/codegen/slice_buffer.h \
+include/grpc/impl/codegen/sync.h \
+include/grpc/impl/codegen/sync_generic.h \
+include/grpc/impl/codegen/sync_posix.h \
+include/grpc/impl/codegen/sync_win32.h \
+include/grpc/impl/codegen/time.h \
src/cpp/client/secure_credentials.cc \
src/cpp/common/auth_property_iterator.cc \
src/cpp/common/secure_auth_context.cc \