Added a note about smart mining to status command. Fixed up a bug where I was resetting bg mining enabled instead of started. Upped the miner threshold. Also moved setting of enabled on start above miner thread creation since starting with true, then stopping, then starting with false resulted in race condition.

src/rpc/core_rpc_server.cpp

@@ -663,6 +663,7 @@ namespace cryptonote
 
     const miner& lMiner = m_core.get_miner();
     res.active = lMiner.is_mining();
+    res.is_background_mining_enabled = lMiner.get_is_background_mining_enabled();
     
     if ( lMiner.is_mining() ) {
       res.speed = lMiner.get_speed();