The syntax of B<value> is identical to B<-sigalgs>. If not set then
the value set for B<-sigalgs> will be used instead.
-=item B<-curves>
-
-This sets the supported elliptic curves. For clients the curves are
-sent using the supported curves extension. For servers it is used
-to determine which curve to use. This setting affects curves used for both
-signatures and key exchange, if applicable.
-
-The B<value> argument is a colon separated list of curves. The curve can be
-either the B<NIST> name (e.g. B<P-256>) or an OpenSSL OID name (e.g
-B<prime256v1>). Curve names are case sensitive.
-
=item B<-groups>
This sets the supported groups. For clients, the groups are