The CI nightly builds had been broken with the following error:
```
error: custom inner attributes are unstable
--> /home/runner/work/moonfire-nvr/moonfire-nvr/server/target/debug/build/moonfire-db-415ce696a754c614/out/schema.rs:10:4
|
10 | #![rustfmt::skip]
| ^^^^^^^^^^^^^
|
= note: `#[deny(soft_unstable)]` on by default
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
```
I'd thought this was by mistake given that #[rustfmt::skip] is still
advertised on rustfmt's github page, but maybe not. Looks like
rust-protobuf's newest version uses
`#![cfg_attr(rustfmt, rustfmt::skip)]` to avoid this error.
Also fix a warning on nightly about an extraneous semicolon.
Scott Lamb