Change:
(and the corresponding elliptic curve domain parameters) to the client. <ins> The ECCCurveType enum used to have values for explicit prime and for explicit char2 curves.  Those values are now deprecated, so only one value remains: </ins> Structure of this message: <del> Indicates the elliptic curve domain parameters are conveyed verbosely, and the underlying finite field is a prime field. Indicates the elliptic curve domain parameters are conveyed verbosely, and the underlying finite field is a characteristic-2 field. Indicates that a named curve is used.  This option SHOULD be used when applicable. </del> <ins> The value named_curve indicates that a named curve is used.  This option SHOULD be used when applicable. </ins> Values 248 through 255 are reserved for private use. The ECCurveType name space is maintained by IANA.  See iana for information on how new value assignments are added. <del> These parameters specify the coefficients of the elliptic curve. Each value contains the byte string representation of a field element following the conversion routine in Section 4.3.3 of ANSI.X9-62.2005. This is the byte string representation of an elliptic curve point following the conversion routine in Section 4.3.6 of ANSI.X9-62.2005.  This byte string may represent an elliptic curve point in uncompressed or compressed format; it MUST conform to what the client has requested through a Supported Point Formats Extension if this extension was used. Indicates representation of a characteristic-2 field using a trinomial basis. Indicates representation of a characteristic-2 field using a pentanomial basis. This identifies the type of the elliptic curve domain parameters. This is the odd prime defining the field Fp. Specifies the coefficients a and b of the elliptic curve E. Specifies the base point G on the elliptic curve. Specifies the order n of the base point. Specifies the cofactor h = #E(Fq)/n, where #E(Fq) represents the number of points on the elliptic curve E defined over the field Fq (either Fp or F2^m). This is the degree of the characteristic-2 field F2^m. The exponent k for the trinomial basis representation x^m + x^k+1. The exponents for the pentanomial representation x^m + x^k3 + x^k2 + x^k1 + 1 (such that k3 > k2 > k1). Specifies a recommended set of elliptic curve domain parameters. All those values of NamedCurve are allowed that refer to a specific curve.  Values of NamedCurve that indicate support for a class of explicitly defined curves are not allowed here (they are only permissible in the ClientHello extension); this applies to arbitrary_explicit_prime_curves(0xFF01) and arbitrary_explicit_char2_curves(0xFF02). Specifies the elliptic curve domain parameters associated with the ECDH public key. The ephemeral ECDH public key. </del> <ins> RFC 4492 had a specification for an ECCurve structure and an ECBasisType structure.  Both of these are omitted now because they were only used with the now deprecated explicit curves. This is the byte string representation of an elliptic curve point following the conversion routine in Section 4.3.6 of ANSI.X9-62.2005. This byte string may represent an elliptic curve point in uncompressed or compressed format; it MUST conform to what the client has requested through a Supported Point Formats Extension if this extension was used.  For the Curve25519 and Curve448 curves, the only valid representation is the one specified in CFRG-Curves - a 32- or 56-octet representation of the u value of the point. This identifies the type of the elliptic curve domain parameters. Specifies a recommended set of elliptic curve domain parameters.  All those values of NamedCurve are allowed that refer to a specific curve.  Values of NamedCurve that indicate support for a class of explicitly defined curves are not allowed here (they are only permissible in the ClientHello extension); this applies to arbitrary_explicit_prime_curves(0xFF01) and arbitrary_explicit_char2_curves(0xFF02). Specifies the elliptic curve domain parameters associated with the ECDH public key. The ephemeral ECDH public key. </ins> The ServerKeyExchange message is extended as follows.

Discussion:
Added new curves and new authors. Partial merge of draft-ietf-tls-curve25519