Update README.rst

README.rst

@@ -360,6 +360,8 @@ Here is the command-line options::
         --subcert=<KEYPATH>:<CERTPATH>
                            Specify additional certificate and private
                            key file. Shrpx will choose certificates
+                           based on the hostname indicated by client
+                           using TLS SNI extension. This option can be
                            used multiple times.
 
       SPDY:
@@ -375,6 +377,14 @@ Here is the command-line options::
                            Sets the initial window size of SPDY
                            backend connection to 2**<N>.
                            Default: 16
+        --backend-spdy-no-tls
+                           Disable SSL/TLS on backend SPDY connections.
+                           SPDY protocol must be specified using
+                           --backend-spdy-proto
+        --backend-spdy-proto
+                           Specify SPDY protocol used in backend
+                           connection if --backend-spdy-no-tls is used.
+                           Default: spdy/3
 
       Mode:
         -s, --spdy-proxy   Enable secure SPDY proxy mode.