BIER in non-MPLS netowrks

as decsribed in section 2.2
  ihttps://tools.ietf.org/html/draft-ietf-bier-mpls-encapsulation-10
with BIFT encoding from:
  https://tools.ietf.org/html/draft-wijnandsxu-bier-non-mpls-bift-encoding-00

changes:
1 - introduce the new BIFT lookup table. BIER tables that have an associated
    MPLS label are added to the MPLS-FIB. Those that don't are added to the
    BIER table
2 - BIER routes that have no associated output MPLS label will add a BIFT label.
3 - The BIER FMask has a path-list as a member to resolve via any possible path.

Change-Id: I1fd4d9dbd074f0e855c16e9329b81460ebe1efce
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/src/vnet/bier/bier_input.c b/src/vnet/bier/bier_input.c
index 88b37fc..dca990d 100644
--- a/src/vnet/bier/bier_input.c
+++ b/src/vnet/bier/bier_input.c
@@ -40,7 +40,7 @@
 vlib_node_registration_t bier_input_node;
 
 /**
- * @brief Packet trace recoed for a BIER output
+ * @brief Packet trace record for BIER input
  */
 typedef struct bier_input_trace_t_
 {