* MM-45956: Optimize FileInfo stats query
We Denormalize Post.ChannelId on FileInfo.ChannelId
```release-note
The file info stats query is now optimized by denormalizing the channelID column into the table itself. This will speed up the query to get the file count for a channel on clicking the RHS.
Migration times:
On a MySQL 8.0.31 DB with
1405 rows in FileInfo and 11M posts, it took around 0.3s
On a Postgres 12.14 DB with
1731 rows in FileInfo and 11M posts, it took around 0.27s
```
https://mattermost.atlassian.net/browse/MM-45956
There is a standard IDNA2008 which defines how unicode characters
in domain names can be compared using UTS (Unicode Technical Standard) 46.
We use that to convert any links in messages to ASCII and
then compare with the domain list in config.
https://mattermost.atlassian.net/browse/MM-51486
```release-note
NONE
```
