| API additions and behavior changes: |
| bufio: add Reader.Discard (https://golang.org/cl/2260) |
| crypto/cipher: clarify what will happen if len(src) != len(dst) for the Stream interface. (https://golang.org/cl/1754) |
| crypto/tls: change default minimum version to TLS 1.0. (https://golang.org/cl/1791) |
| encoding/base64: add unpadded encodings (https://golang.org/cl/1511) |
| net/http: support for setting trailers from a server Handler (https://golang.org/cl/2157) |
| net/smtp: add TLSConnectionState accessor (https://golang.org/cl/2151) |
| strconv: optimize decimal to string conversion (https://golang.org/cl/2105) |
