all: fix a few typos in comments

Change-Id: I0455ffaa51c661803d8013c7961910f920d3c3cc
Reviewed-on: https://go-review.googlesource.com/37043Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/net/http/server.go

@@ -839,7 +839,7 @@ func (srv *Server) initialReadLimitSize() int64 {
 	return int64(srv.maxHeaderBytes()) + 4096 // bufio slop
 }
 
-// wrapper around io.ReaderCloser which on first read, sends an
+// wrapper around io.ReadCloser which on first read, sends an
 // HTTP/1.1 100 Continue header
 type expectContinueReader struct {
 	resp       *response

src/reflect/type.go

@@ -3156,7 +3156,7 @@ func ifaceIndir(t *rtype) bool {
 	return t.kind&kindDirectIface == 0
 }
 
-// Layout matches runtime.BitVector (well enough).
+// Layout matches runtime.gobitvector (well enough).
 type bitVector struct {
 	n    uint32 // number of bits
 	data []byte