pimd: Fix interface "no ip igmp" should not disrupt PIM. Plus docs updates.
diff --git a/pimd/pim_cmd.c b/pimd/pim_cmd.c
index a49264a..8b51977 100644
--- a/pimd/pim_cmd.c
+++ b/pimd/pim_cmd.c
@@ -2481,7 +2481,7 @@
 
   pim_if_membership_clear(ifp);
 
-  pim_if_addr_del_all(ifp);
+  pim_if_addr_del_all_igmp(ifp);
 
   if (!PIM_IF_TEST_PIM(pim_ifp->options)) {
     pim_if_delete(ifp);