Zabbix

.......... [DEV-3693] fixed invalid read error in user macro opening

* commit '6d7dbe0a15ec43cbc943fd2c8ba9a29739a31823':
  .......... [DEV-3693] added note to zbx_dc_close_user_macros function
  .......... [DEV-3693] fixed order of closing user macro cache
  .......... [DEV-3693] fixed invalid read error