add ECC strings to ciphers(1), point out difference between DH and ECDH

* Make a clear distinction between DH and ECDH key exchange.
 * Group all key exchange cipher suite identifiers, first DH then ECDH
 * add descriptions for all supported *DH* identifiers
 * add ECDSA authentication descriptions
 * add example showing how to disable all suites that offer no
   authentication or encryption

doc/apps/ciphers.pod

@@ -132,8 +132,8 @@ specified.
 =item B<COMPLEMENTOFDEFAULT>
 
 the ciphers included in B<ALL>, but not enabled by default. Currently
-this is B<ADH>. Note that this rule does not cover B<eNULL>, which is
-not included by B<ALL> (use B<COMPLEMENTOFALL> if necessary).
+this is B<ADH> and B<AECDH>. Note that this rule does not cover B<eNULL>,
+which is not included by B<ALL> (use B<COMPLEMENTOFALL> if necessary).
 
 =item B<ALL>
 
@@ -182,22 +182,59 @@ included.
 =item B<aNULL>
 
 the cipher suites offering no authentication. This is currently the anonymous
-DH algorithms. These cipher suites are vulnerable to a "man in the middle"
-attack and so their use is normally discouraged.
+DH algorithms and anonymous ECDH algorithms. These cipher suites are vulnerable
+to a "man in the middle" attack and so their use is normally discouraged.
 
 =item B<kRSA>, B<aRSA>, B<RSA>
 
 cipher suites using RSA key exchange, authentication or either respectively.
 
-=item B<kDHE>
-
-cipher suites using ephemeral DH key agreement.
-
 =item B<kDHr>, B<kDHd>, B<kDH>
 
 cipher suites using DH key agreement and DH certificates signed by CAs with RSA
 and DSS keys or either respectively.
 
+=item B<kDHE>, B<kEDH>
+
+cipher suites using ephemeral DH key agreement, including anonymous cipher
+suites.
+
+=item B<DHE>, B<EDH>
+
+cipher suites using authenticated ephemeral DH key agreement.
+
+=item B<ADH>
+
+anonymous DH cipher suites, note that this does not include anonymous Elliptic
+Curve DH (ECDH) cipher suites.
+
+=item B<DH>
+
+cipher suites using DH, including anonymous DH, ephemeral DH and fixed DH.
+
+=item B<kECDHr>, B<kECDHe>, B<kECDH>
+
+cipher suites using fixed ECDH key agreement signed by CAs with RSA and ECDSA
+keys or either respectively.
+
+=item B<kEECDH>, B<kECDHE>
+
+cipher suites using ephemeral ECDH key agreement, including anonymous
+cipher suites.
+
+=item B<ECDHE>, B<EECDHE>
+
+cipher suites using authenticated ephemeral ECDH key agreement.
+
+=item B<AECDH>
+
+anonymous Elliptic Curve Diffie Hellman cipher suites.
+
+=item B<ECDH>
+
+cipher suites using ECDH key exchange, including anonymous, ephemeral and
+fixed ECDH.
+
 =item B<aDSS>, B<DSS>
 
 cipher suites using DSS authentication, i.e. the certificates carry DSS keys.
@@ -207,6 +244,16 @@ cipher suites using DSS authentication, i.e. the certificates carry DSS keys.
 cipher suites effectively using DH authentication, i.e. the certificates carry
 DH keys.
 
+=item B<aECDH>
+
+cipher suites effectively using ECDH authentication, i.e. the certificates
+carry ECDH keys.
+
+=item B<aECDSA>, B<ECDSA>
+
+cipher suites using ECDSA authentication, i.e. the certificates carry ECDSA
+keys.
+
 =item B<kFZA>, B<aFZA>, B<eFZA>, B<FZA>
 
 ciphers suites using FORTEZZA key exchange, authentication, encryption or all
@@ -217,14 +264,6 @@ FORTEZZA algorithms. Not implemented.
 TLS v1.2, TLS v1.0, SSL v3.0 or SSL v2.0 cipher suites respectively. Note:
 there are no ciphersuites specific to TLS v1.1.
 
-=item B<DH>
-
-cipher suites using DH, including anonymous DH, ephemeral DH and fixed DH.
-
-=item B<ADH>
-
-anonymous DH cipher suites.
-
 =item B<AES128>, B<AES256>, B<AES>
 
 cipher suites using 128 bit AES, 256 bit AES or either 128 or 256 bit AES.
@@ -582,6 +621,11 @@ strength:
 
  openssl ciphers -v 'ALL:!ADH:@STRENGTH'
 
+Include all ciphers except ones with no encryption (eNULL) or no
+authentication (aNULL):
+
+ openssl ciphers -v 'ALL:!aNULL'
+
 Include only 3DES ciphers and then place RSA ciphers last:
 
  openssl ciphers -v '3DES:+RSA'