Merge remote-tracking branch 'origin/1.3nsq' into 1.3nsq

chenshijun

2019-04-15 ad8ee0872802ba5d0194458bf215a6cc89f4d0d0

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#include "BaseDao.h"
mysqlpp::Connection* BaseDao::conn = nullptr;
QMutex BaseDao::m_mutexVisit;