doc: mention several recent crypto changes in go1.5.txt

Change-Id: Icf212fc7ea108ff22bb7fa9da137410d729d2569
Reviewed-on: https://go-review.googlesource.com/9413Reviewed-by: Adam Langley <agl@golang.org>

doc/go1.5.txt

@@ -27,8 +27,13 @@ bytes: add Buffer.Cap (https://golang.org/cl/8342)
 bytes, strings: add Reader.Size (https://golang.org/cl/3199)
 crypto/cipher: clarify what will happen if len(src) != len(dst) for the Stream interface. (https://golang.org/cl/1754)
 crypto/elliptic: add Name field to CurveParams struct (https://golang.org/cl/2133)
+crypto/elliptic: Unmarshaling points now automatically checks that the point is on the curve (https://golang.org/cl/2421)
 crypto/tls: change default minimum version to TLS 1.0. (https://golang.org/cl/1791)
+crypto/tls: including Certificate Transparency SCTs in the handshake is now supported (https://golang.org/cl/8988)
+crypto/tls: session ticket keys can now be rotated at runtime (https://golang.org/cl/9072)
+crypto/tls: servers will now always call GetCertificate to pick a certificate for a connection when Certificates is empty (https://golang.org/cl/8792)
 crypto/x509: wildcards are now only accepted as the first label (https://golang.org/cl/5691)
+crypto/x509: unknown critical extensions now cause errors in Verify, not when parsing (https://golang.org/cl/9390)
 database/sql: add Stats (https://golang.org/cl/7950)
 encoding/base64: add unpadded encodings (https://golang.org/cl/1511)
 flag: new nicer format for PrintDefaults (https://golang.org/cl/7330)