[tz] Regarding timezone upgrade from 2017c to 2018c

Hi, While upgrading to 2018c timezone, I found below changes : ./etc/localtime ./etc/localtime ==> Newly added ./etc/zoneinfo/localtime -> GMT ==> This entry is removed ./etc/zoneinfo/GMT ./etc/zoneinfo/GMT ==> Changed to ==> ./etc/zoneinfo/GMT link ./etc/localtime ./etc/zoneinfo/US/Pacific-New -> ../America/Los_Angeles ==> This entry is removed ./etc/zoneinfo/Africa/Sao_Tome -> ../Atlantic/St_Helena ==> Changed to ==> ./etc/zoneinfo/Africa/Sao_Tome ./etc/zoneinfo/Africa/Sao_Tome Please let me know, if the above changes are expected according to 2018c TZ database change. Regards, D Pal