After one too many pipeline failures due to old spell-checking
mistakes, I decided to own up to my stuff and spell check
everything. I actually ran:

     codespell --interactive 3 --write-changes *

And dealt with *almost* all the errors, except stuff in old/ which
I'll remove shortly.

When an error comes up now, it is new and should be fixed.

doc/accounts.md

@@ -102,7 +102,7 @@ The sponsor will [create a ticket in GitLab](https://gitlab.torproject.org/tpo/t
 #### username policy ####
 
 Usernames are allocated on a first-come, first-served basis. Usernames
-should be checked for conflict with commonly used adminstrative
+should be checked for conflict with commonly used administrative
 aliases (`root`, `abuse`, ...) or abusive names (`killall*`, ...). In
 particular, the following have special meaning for various services
 and should be avoided: