assorted doc fixes:
treeb87efc3f15a6b6546419038c6096d72cfccfce09
-rw-r--r-- 6 .gitignore
-rw-r--r-- 993 2021-07-who-uses.txt
drwxr-xr-x - archive
drwxr-xr-x - bin
drwxr-xr-x - docs
-rw-r--r-- 2624 mkdocs.yml