upstream: Replace the term "security key" with "(FIDO)

authenticator".

The polysemous use of "key" was too confusing.  Input from markus@.
ok jmc@

OpenBSD-Commit-ID: 12eea973a44c8232af89f86e4269d71ae900ca8f
diff --git a/ssh.1 b/ssh.1
index 8b4b79e..9713375 100644
--- a/ssh.1
+++ b/ssh.1
@@ -33,8 +33,8 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: ssh.1,v 1.408 2019/11/30 07:07:59 jmc Exp $
-.Dd $Mdocdate: November 30 2019 $
+.\" $OpenBSD: ssh.1,v 1.409 2019/12/21 20:22:34 naddy Exp $
+.Dd $Mdocdate: December 21 2019 $
 .Dt SSH 1
 .Os
 .Sh NAME
@@ -903,11 +903,11 @@
 .Pa ~/.ssh/id_ecdsa
 (ECDSA),
 .Pa ~/.ssh/id_ecdsa_sk
-(security key-hosted ECDSA),
+(authenticator-hosted ECDSA),
 .Pa ~/.ssh/id_ed25519
 (Ed25519),
 .Pa ~/.ssh/id_ed25519_sk
-(security key-hosted Ed25519),
+(authenticator-hosted Ed25519),
 or
 .Pa ~/.ssh/id_rsa
 (RSA)
@@ -917,11 +917,11 @@
 .Pa ~/.ssh/id_ecdsa.pub
 (ECDSA),
 .Pa ~/.ssh/id_ecdsa_sk.pub
-(security key-hosted ECDSA),
+(authenticator-hosted ECDSA),
 .Pa ~/.ssh/id_ed25519.pub
 (Ed25519),
 .Pa ~/.ssh/id_ed25519_sk.pub
-(security key-hosted Ed25519),
+(authenticator-hosted Ed25519),
 or
 .Pa ~/.ssh/id_rsa.pub
 (RSA)