[Ach] chacha20 as replacement for RC4 based ciphersuites

[Aaron Zauner]

Currently in discussion on the IETF TLS working group mailing list are the following new ciphersuites:

http://www.ietf.org/mail-archive/web/tls/current/maillist.html

```
5.  IANA Considerations

   IANA is requested to allocate the following numbers in the TLS Cipher
   Suite Registry (note that the third column contains the suggested
   ciphersuite numbers):

  TLS_RSA_WITH_CHACHA_SHA1                 = {0xTBD, 0xTBD}  {0xE5, 0x00}
  TLS_ECDHE_RSA_WITH_CHACHA_SHA1           = {0xTBD, 0xTBD}  {0xE5, 0x01}
  TLS_ECDHE_ECDSA_WITH_CHACHA_SHA1         = {0xTBD, 0xTBD}  {0xE5, 0x02}

  TLS_PSK_WITH_CHACHA_SHA1                 = {0xTBD, 0xTBD}  {0xE5, 0x03}
  TLS_ECDHE_PSK_WITH_CHACHA_SHA1           = {0xTBD, 0xTBD}  {0xE5, 0x04}
  TLS_RSA_PSK_WITH_CHACHA_SHA1             = {0xTBD, 0xTBD}  {0xE5, 0x05}

  TLS_DHE_PSK_WITH_CHACHA_SHA1             = {0xTBD, 0xTBD}  {0xE5, 0x06}
  TLS_DHE_RSA_WITH_CHACHA_SHA1             = {0xTBD, 0xTBD}  {0xE5, 0x07}

```

Aaron
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