===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/ssh/ssh_config.5,v
retrieving revision 1.270
retrieving revision 1.271
diff -u -r1.270 -r1.271
--- src/usr.bin/ssh/ssh_config.5	2018/04/05 22:54:28	1.270
+++ src/usr.bin/ssh/ssh_config.5	2018/04/06 13:02:39	1.271
@@ -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 1.270 2018/04/05 22:54:28 djm Exp $
-.Dd $Mdocdate: April 5 2018 $
+.\" $OpenBSD: ssh_config.5,v 1.271 2018/04/06 13:02:39 djm Exp $
+.Dd $Mdocdate: April 6 2018 $
 .Dt SSH_CONFIG 5
 .Os
 .Sh NAME
@@ -1394,11 +1394,16 @@
 across multiple
 .Cm SendEnv
 directives.
-The default is not to send any environment variables.
 .Pp
 See
 .Sx PATTERNS
 for more information on patterns.
+.Pp
+It is possible to clear previously-set
+.Cm SendEnv
+variable names by prefixing patterns with
+.Pa - .
+The default is not to send any environment variables.
 .It Cm ServerAliveCountMax
 Sets the number of server alive messages (see below) which may be
 sent without