添加http文件服务可挂载物理目录，新增ENABLE_API_STATIC_LIB

sa

src/Common/config.cpp

@@ -112,6 +112,8 @@ const string kKeepAliveSecond = HTTP_FIELD"keepAliveSecond";
 const string kCharSet = HTTP_FIELD"charSet";
 //http 服务器根目录
 const string kRootPath = HTTP_FIELD"rootPath";
+//http 服务器虚拟目录
+const string kVirtualPath = HTTP_FIELD "virtualPath";
 //http 404错误提示内容
 const string kNotFound = HTTP_FIELD"notFound";
 //是否显示文件夹菜单