added mobike=yes|no connection option

yes: include mobike support notifies as initiator
  no: only enable mobike as responder when initiator supports it
  default: yes

src/starter/keywords.h

@@ -70,6 +70,7 @@ typedef enum {
     KW_AUTH,
     KW_AUTHBY,
     KW_EAP,
+    KW_MOBIKE,
     KW_IKELIFETIME,
     KW_KEYLIFE,
     KW_REKEYMARGIN,