Add migration .ssh root files.

pym/cl_install.py

@@ -2446,7 +2446,9 @@ class cl_install(color_print, SignalInterrupt):
             _("Coping configuration files to the new system"))
         fileMask = r"/etc/udev/rules\.d/70-persistent-net\.rules"
         if self.clVars.Get('os_root_type') != "livecd":
-            fileMask = "(%s|/etc/ssh/ssh_host_.*)"%fileMask
+            fileMask = \
+                "(%s|/etc/ssh/ssh_host_.*|/root/.ssh/(id_.*|known_hosts))"% \
+                    fileMask
         fileCpy = otherfilesCopy(target=targetDistr.getDirectory(),
                                  reTest=fileMask)
         fileCpy.performCopy('/etc')