change documentation and comments to indicate that we prefer the
standard "DHE" naming scheme everywhere over the older "EDH"

DHE is the standard term used by the RFCs and by other TLS
implementations.  It's useful to have the internal variables use the
standard terminology.

This patch leaves a synonym SSL_kEDH in place, though, so that older
code can still be built against it, since that has been the
traditional API.  SSL_kEDH should probably be deprecated at some
point, though.

PR: 1503
Submitted by: KISA
Reviewed by: Bodo Moeller

PR: 1461

Submitted by: Masashi Fujita
Reviewed by: Bodo Moeller

If no authentication method is mentioned in the cipher suite name (e.g.
AES128-SHA), RSA authentication is used (PR #396).

Submitted by:
Reviewed by:
PR: 127

Allow ADH to be used but not present in the default cipher
list.

Allow CERTIFICATE to be used in PEM headers for PKCS#7 structures:
some CAs do this.

comment.

Add documentation for the ciphers command including a full
description of cipher lists.