net/http: fix type name in comment

Change-Id: Ia03f993287d2929f35b4c92d00fe25c7243bd8b3
Reviewed-on: https://go-review.googlesource.com/32685Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

src/net/http/server.go

@@ -262,7 +262,7 @@ type conn struct {
 
 	curReq atomic.Value // of *response (which has a Request in it)
 
-	curState atomic.Value // of ConnectionState
+	curState atomic.Value // of ConnState
 
 	// mu guards hijackedv
 	mu sync.Mutex