Fixes #2916: 'admindb' is now replaced if current one doesn't match the one in the static object

include/proxysql_config.h

@@ -7,8 +7,8 @@ class SQLite3DB;
 extern const char* config_header;
 
 class ProxySQL_Config {
-	SQLite3DB* admindb;
 public:
+	SQLite3DB* admindb;
 	ProxySQL_Config(SQLite3DB* db);
 	virtual ~ProxySQL_Config();
 

include/proxysql_restapi.h

@@ -22,8 +22,8 @@ public:
 };
 
 class ProxySQL_Restapi {
-	SQLite3DB* admindb;
 public:
+	SQLite3DB* admindb;
 	ProxySQL_Restapi(SQLite3DB* db);
 	virtual ~ProxySQL_Restapi();
 

lib/ProxySQL_Admin.cpp

@@ -778,11 +778,17 @@ int ProxySQL_Test___GetDigestTable(bool reset, bool use_swap) {
 
 ProxySQL_Config& ProxySQL_Admin::proxysql_config() {
 	static ProxySQL_Config instance = ProxySQL_Config(admindb);
+	if (instance.admindb != admindb) {
+		instance.admindb = admindb;
+	}
 	return instance;
 }
 
 ProxySQL_Restapi& ProxySQL_Admin::proxysql_restapi() {
 	static ProxySQL_Restapi instance = ProxySQL_Restapi(admindb);
+	if (instance.admindb != admindb) {
+		instance.admindb = admindb;
+	}
 	return instance;
 }