Starting from this commit, there will be no more merges from 4.3 to 4.4.
That is: fixes affecting both 4.3 and 4.4 will have to be sent
in separate pull requests.
This change is due to two reasons:
1. The ever increasing divergence from 4.4 is making the merges
to cause more and more conflicts which are also harder to resolve
2. Opensource edition 4.3 has come to the 18-month EOL by November 2022
Zaiming (Stone) Shi