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_table.c b/src/vnet/bier/bier_table.c
index edfb754..a9f8a6d 100644
--- a/src/vnet/bier/bier_table.c
+++ b/src/vnet/bier/bier_table.c
@@ -251,7 +251,7 @@
                                           FIB_SOURCE_BIER);
 
         /*
-         * stack the entry on the forwarding chain prodcued by the
+         * stack the entry on the forwarding chain produced by the
          * path-list via the ECMP tables.
          */
         fib_path_list_contribute_forwarding(bt->bt_pl,
@@ -309,7 +309,7 @@
     }
 
     /*
-     * no oppotunity to share, this the resolving ECMP tables are unique
+     * no opportunity to share, this the resolving ECMP tables are unique
      * to this table.
      * no need to be a child of the path list, we can do nothing with any
      * notifications it would generate [not that it will].