Re: GB18030-2022 Support in PostgreSQL

So the work for GB18030 is done.

I just want to check with your two more items:

* Do we want to switch UHC from using xml to ucm? That would not lead to map file change, instead it just removes the code of parsing xml file, making future maintenance easier.

* For the makefile changes: https://commitfest.postgresql.org/patch/5953/. Say, ucm has some changes, now make will only rebuild maps files, even if map files are regenerated with differences, corresponding .o files are not automatically rebuilt. I encountered this problem when I started to work on the gb18030 task. I made the change, but because of the problem, postgresql binary was not actually rebuilt to include my change, which led to confusion and wasted time.

Please let me know. Your guidance is greatly appreciated.