Typos.  A bunch of typos I've been collecting.

Change-Id: I53ab8d17914e6563110354e4052109ac02bf8f3b
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
diff --git a/src/vnet/bier/bier_input.c b/src/vnet/bier/bier_input.c
index dca990d..d95df84 100644
--- a/src/vnet/bier/bier_input.c
+++ b/src/vnet/bier/bier_input.c
@@ -107,7 +107,7 @@
             bier_hdr_ntoh(bh0);
 
             /*
-             * In the MPLS decap node we squirelled away the
+             * In the MPLS decap node we squirrelled away the
              * index for the BIER table as the tx adjacency
              */
             bt_index0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];