Fixing headers and paths after merge with upstream.
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index b2ebb2d..185d247 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -760,12 +760,10 @@
# spaces.
# Note: If this tag is empty the current directory is searched.
-INPUT = include/grpc++/auth_metadata_processor.h \
-include/grpc++/channel.h \
+INPUT = include/grpc++/channel.h \
include/grpc++/client_context.h \
include/grpc++/completion_queue.h \
include/grpc++/create_channel.h \
-include/grpc++/credentials.h \
include/grpc++/generic/async_generic_service.h \
include/grpc++/generic/generic_stub.h \
include/grpc++/impl/call.h \
@@ -782,13 +780,15 @@
include/grpc++/impl/thd.h \
include/grpc++/impl/thd_cxx11.h \
include/grpc++/impl/thd_no_cxx11.h \
+include/grpc++/security/auth_context.h \
+include/grpc++/security/auth_metadata_processor.h \
+include/grpc++/security/credentials.h \
+include/grpc++/security/server_credentials.h \
include/grpc++/server.h \
include/grpc++/server_builder.h \
include/grpc++/server_context.h \
-include/grpc++/server_credentials.h \
include/grpc++/support/async_stream.h \
include/grpc++/support/async_unary_call.h \
-include/grpc++/support/auth_context.h \
include/grpc++/support/byte_buffer.h \
include/grpc++/support/channel_arguments.h \
include/grpc++/support/config.h \