add sshd-session to msi (#753)

Author: tgauth

contrib/win32/install/server.wxs

@@ -9,6 +9,9 @@
             <Component>
                 <File Name="ssh-shellhost.exe" KeyPath="yes" />
             </Component>
+            <Component>
+                <File Name="sshd-session.exe" KeyPath="yes" />
+            </Component>
             <Component>
                 <File Id="sshd.exe" Name="sshd.exe" KeyPath="yes" />
                 <RegistryKey Root="HKLM" Key="SOFTWARE\OpenSSH" ForceCreateOnInstall="yes">