http2: fix tipos in comment

Change-Id: I20cd0f8db534fe2a849306eb7e0c8ee5b434e88f
Reviewed-on: https://go-review.googlesource.com/c/net/+/576175
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>

http2/frame.go

@@ -1591,7 +1591,7 @@ func (fr *Framer) readMetaFrame(hf *HeadersFrame) (*MetaHeadersFrame, error) {
 				log.Printf("http2: header list too large")
 			}
 			// It would be nice to send a RST_STREAM before sending the GOAWAY,
-			// but the struture of the server's frame writer makes this difficult.
+			// but the structure of the server's frame writer makes this difficult.
 			return nil, ConnectionError(ErrCodeProtocol)
 		}
 
@@ -1603,7 +1603,7 @@ func (fr *Framer) readMetaFrame(hf *HeadersFrame) (*MetaHeadersFrame, error) {
 				log.Printf("http2: invalid header: %v", invalid)
 			}
 			// It would be nice to send a RST_STREAM before sending the GOAWAY,
-			// but the struture of the server's frame writer makes this difficult.
+			// but the structure of the server's frame writer makes this difficult.
 			return nil, ConnectionError(ErrCodeProtocol)
 		}