add file descriptor migration

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Chris Lalancette <clalance@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/migration.c b/migration.c
index 34e2bc1..c18d595 100644
--- a/migration.c
+++ b/migration.c
@@ -45,6 +45,8 @@
         exec_start_incoming_migration(p);
     else if (strstart(uri, "unix:", &p))
         unix_start_incoming_migration(p);
+    else if (strstart(uri, "fd:", &p))
+        fd_start_incoming_migration(p);
 #endif
     else
         fprintf(stderr, "unknown migration protocol: %s\n", uri);
@@ -62,6 +64,8 @@
         s = exec_start_outgoing_migration(p, max_throttle, detach);
     else if (strstart(uri, "unix:", &p))
         s = unix_start_outgoing_migration(p, max_throttle, detach);
+    else if (strstart(uri, "fd:", &p))
+        s = fd_start_outgoing_migration(mon, p, max_throttle, detach);
 #endif
     else
         monitor_printf(mon, "unknown migration protocol: %s\n", uri);