Allow the "quorum" command line option to lock the quorum

src/ripple/core/Config.h

@@ -206,6 +206,7 @@ public:
     // Note: The following parameters do not relate to the UNL or trust at all
     std::size_t                 NETWORK_QUORUM = 0;         // Minimum number of nodes to consider the network present
     int                         VALIDATION_QUORUM = 1;      // Minimum validations to consider ledger authoritative
+    bool                        LOCK_QUORUM = false;        // Do not raise the quorum
 
     // Peer networking parameters
     bool                        PEER_PRIVATE = false;           // True to ask peers not to relay current IP.