Adding the normal tag.

deanberris · deanberris · commit 3133d244951f · 2010-11-28T14:06:59.000+08:00
diff --git a/boost/network/tags.hpp b/boost/network/tags.hpp
@@ -16,6 +16,7 @@
 namespace boost { namespace network { namespace tags {
 
     struct pod {};
+    struct normal {};
     struct async {};
     struct tcp {};
     struct udp {};
