Add channel arg for max send message size and add message size filter.
diff --git a/config.m4 b/config.m4
index 5b47074..c1b2fd9 100644
--- a/config.m4
+++ b/config.m4
@@ -90,6 +90,7 @@
     src/core/lib/channel/handshaker.c \
     src/core/lib/channel/http_client_filter.c \
     src/core/lib/channel/http_server_filter.c \
+    src/core/lib/channel/message_size_filter.c \
     src/core/lib/compression/compression.c \
     src/core/lib/compression/message_compress.c \
     src/core/lib/debug/trace.c \