Adding tty makes sure docker attach won't be accidentally detached
by ctrl-C (there are better ways of doing this but this one works
for now)
shell-words more closely emulates Bash's tokenizer rules (but without
doing things like environment variable expansion) which allows us to use
multiline strings as reasons, etc. Unfortunately entering newlines
still won't work the way we've written things since shell-words does not
right now give enough information to incrementally build up a valid
string, just says there was a tokenizing error; but maybe in the future
we can fix that.
The security model has been updated to reflect this change (for example,
moderators cannot revert a ban by an administrator). Ban history is
also now recorded in the ban file, and much more information about the
ban is stored (whitelists and administrators also have extra
information).
To support the new information without losing important information,
this commit also introduces a new migration path for editable settings
(both from legacy to the new format, and between versions). Examples
of how to do this correctly, and migrate to new versions of a settings
file, are in the settings/ subdirectory.
As part of this effort, editable settings have been revamped to
guarantee atomic saves (due to the increased amount of information in
each file), some latent bugs in networking were fixed, and server-cli
has been updated to go through StructOpt for both calls through TUI
and argv, greatly simplifying parsing logic.
