doc: list pimd.8 in EXTRA_DIST

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
diff --git a/doc/Makefile.am b/doc/Makefile.am
index dfc5e40..bb7e87a 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -109,7 +109,7 @@
 
 EXTRA_DIST = BGP-TypeCode draft-zebra-00.ms draft-zebra-00.txt \
 	bgpd.8 isisd.8 ospf6d.8 ospfclient.8 ospfd.8 ripd.8 \
-	ripngd.8 vtysh.1 watchquagga.8 zebra.8 \
+	ripngd.8 pimd.8 vtysh.1 watchquagga.8 zebra.8 \
 	mpls/ChangeLog.opaque.txt mpls/cli_summary.txt \
 	mpls/opaque_lsa.txt mpls/ospfd.conf \
 	$(figures_sources) $(figures_png) $(figures_txt)