mention ssh -Q feature to list supported { MAC, cipher, KEX, key }

algorithms in more places and include the query string used to
list the relevant information; bz#2288

1 files changed, 26 insertions, 3 deletions

diff --git a/usr.bin/ssh/ssh_config.5 b/usr.bin/ssh/ssh_config.5
index 33da983ea7a..7a5dd52c852 100644
--- a/usr.bin/ssh/ssh_config.5
+++ b/usr.bin/ssh/ssh_config.5
@@ -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_config.5,v 1.197 2014/12/21 23:12:42 djm Exp $
-.Dd $Mdocdate: December 21 2014 $
+.\" $OpenBSD: ssh_config.5,v 1.198 2014/12/22 09:05:17 djm Exp $
+.Dd $Mdocdate: December 22 2014 $
 .Dt SSH_CONFIG 5
 .Os
 .Sh NAME
@@ -417,7 +417,9 @@ aes192-cbc,aes256-cbc,arcfour
 The list of available ciphers may also be obtained using the
 .Fl Q
 option of
-.Xr ssh 1 .
+.Xr ssh 1
+with an argument of
+.Dq cipher .
 .It Cm ClearAllForwardings
 Specifies that all local, remote, and dynamic port forwardings
 specified in the configuration files or on the command line be
@@ -793,6 +795,13 @@ ssh-ed25519,ssh-rsa,ssh-dss
 .Pp
 If hostkeys are known for the destination host then this default is modified
 to prefer their algorithms.
+.Pp
+The list of available key types may also be obtained using the
+.Fl Q
+option of
+.Xr ssh 1
+with an argument of
+.Dq key .
 .It Cm HostKeyAlias
 Specifies an alias that should be used instead of the
 real host name when looking up or saving the host key
@@ -963,6 +972,13 @@ diffie-hellman-group14-sha1,
 diffie-hellman-group-exchange-sha1,
 diffie-hellman-group1-sha1
 .Ed
+.Pp
+The list of available key exchange algorithms may also be obtained using the
+.Fl Q
+option of
+.Xr ssh 1
+with an argument of
+.Dq kex .
 .It Cm LocalCommand
 Specifies a command to execute on the local machine after successfully
 connecting to the server.
@@ -1052,6 +1068,13 @@ hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,
 hmac-md5,hmac-sha1,hmac-ripemd160,
 hmac-sha1-96,hmac-md5-96
 .Ed
+.Pp
+The list of available MAC algorithms may also be obtained using the
+.Fl Q
+option of
+.Xr ssh 1
+with an argument of
+.Dq mac .
 .It Cm NoHostAuthenticationForLocalhost
 This option can be used if the home directory is shared across machines.
 In this case localhost will refer to a different machine on each of