Add --no-extra flag to join command

It was found that when joining servers to a cluster any additional servers
would not honour the `--no-extras` flag used with the install command.

It is necessary, therefore, for the flag to be added to `join` and only
be applied in situations where `--server` has been provided.

Signed-off-by: Richard Gee <[email protected]>

Bump golang.org/x/crypto from 0.13.0 to 0.17.0

Bumps [golang.org/x/crypto](https://github.com/golang/crypto) from 0.13.0 to 0.17.0.
- [Commits](golang/crypto@v0.13.0...v0.17.0)

---
updated-dependencies:
- dependency-name: golang.org/x/crypto
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Add --server-k3s-extra-args for disabling traefik etc

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Add notes to README for k3sup plan

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Update vendor

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Ignore gofmt errors from vendor folder

This started failing with Go 1.20, but I haven't been able
to find out why yet, despite vendor being excluded from the
list of packages/files to test.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Replace sponsorship note with actuated info

Folks do not sponsor me, it's sad, and unfortunate, but I
know they love and use k3sup extensively.

Perhaps they'll also like actuated.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Add --tls-san for join command for servers

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Print agent host/IP in join command

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Rename no-deploy to disable

Due to a change in the K3s installer, this is being changed.

There is no compatibility with K3s 1.17 for this version of
the tool.

Use an older version if you wish to use K3s 1.17.

Closes: alexellis#397 alexellis#396 alexellis#394

Users who find value in K3sup are encouraged to sponsor
me on GitHub, being taken for granted is not a motivator.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>