Synchronize the develop branch from official WRF GitHub#1

Merged

cenlinhe merged 2 commits intocenlinhe:developfrom

wrf-model:develop

Dec 17, 2020

Commits on Dec 11, 2020

Add the new capability for MRI-4DVar (#1330)
liujake
authored

Commits on Dec 15, 2020

numerous changes to icloud3 option; improvements after testing with Mei Xu (#1322)
gthompsnWRF
authored