fw: Add ASF strategy parameters n-silent-timeouts & probing-interval

refs: #4193

Change-Id: I9572425a2fdcbf67b9886c2a5b6b50a10a0856e2
diff --git a/docs/manpages.rst b/docs/manpages.rst
index 0dd78eb..e2e0582 100644
--- a/docs/manpages.rst
+++ b/docs/manpages.rst
@@ -18,4 +18,5 @@
    manpages/ndn-autoconfig-server
    misc/local-prefix-discovery
    manpages/nfd-autoreg
+   manpages/nfd-asf-strategy
    :maxdepth: 1