Scott Lamb dcfe792032 display String panic msgs as well as &str ones
For #136. I'm also going to make this particular case no longer panic,
but there will surely be other affected panics.

Before:

```
E20210803 08:58:31.606 main moonfire_nvr] panic at '/Users/slamb/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.14.10/src/server/server.rs:68:17'
```

After:

```
E20210803 08:59:51.319 main moonfire_nvr] panic at '/Users/slamb/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.14.10/src/server/server.rs:68:17': error binding to 0.0.0.0:80: error creating server listener: Address already in use (os error 48)
```
2021-08-03 09:00:37 -05:00
..
2021-05-17 15:00:51 -07:00
2021-07-09 15:01:15 -07:00
2021-07-09 15:01:15 -07:00
2021-07-09 15:01:15 -07:00