doc: add initial nhrpd documentation
diff --git a/doc/bgpd.8 b/doc/bgpd.8
index 1a873b4..e680ddb 100644
--- a/doc/bgpd.8
+++ b/doc/bgpd.8
@@ -109,6 +109,7 @@
 .BR ospfd (8),
 .BR ospf6d (8),
 .BR isisd (8),
+.BR nhrpd (8),
 .BR zebra (8),
 .BR vtysh (1)
 .SH BUGS