update log helptext to match actual levels

[djdv]

It looks like "warning" and "critical" levels were removed, but the help text wasn't updated to reflect this.

> ipfs.exe version --all
go-ipfs version: 0.5.0-rc3
Repo version: 9
System version: amd64/windows
Golang version: go1.13.10
> ipfs.exe log level all warning
Error: unrecognized level: "warning"
> ipfs.exe log level all critical
Error: unrecognized level: "critical"

[Stebalien]

Thanks for catching this! "warning" was renamed to "warn".

[djdv]

I noticed the other values like DPANIC within the log package are accepted via this command too. Should they be added?

// Supported strings are: DEBUG, INFO, WARN, ERROR, DPANIC, PANIC, FATAL, and
// their lower-case forms.

https://github.com/ipfs/go-log/blob/54443fbc2ea88e1a8262b668cd948d3f1247cd1b/levels.go#L22-L23

[Stebalien]

Ideally, yes.

[djdv]

Should be all good now.
(I did notice some of the helptext keeps to the 80 character bound, but not all of it. So I'm guessing this is fine without an explicit line-break)

[Stebalien]

I'd try to keep to 80 characters, we don't wrap elsewhere.

Could you rebase on master (and squash)? That should fix CI.

[djdv]

I put the possible values for both IPFS_LOGGING and IPFS_LOGGING_FMT on a newline that's indented under them. Both fall under 80 and look consistent. If they should look another way just let me know.

This is how it's displaying for me: