Add --tls-san for join command for servers

A call for sponsors

If you're using K3sup, please sponsor me on whatever tier you like 🏆

This was a missing part of the HA story, that sets an extra IP or hostname in the TLS cert for the kubelet on each host, so that they can be used interchangeably behind a load-balancer, proxy, inlets or something else.

k3sup join --server \
  --server-ip $SERVER_IP \
  --ip EXTRA_SERVER_IP \
  --tls-san LB_IP

Changelog for 0.12.14:

Commits
e4107dd Add --tls-san for join command for servers by @alexellis
d47b699 Update README.md by @alexellis
8e9af1c Update README.md by @alexellis
638c02d Update caption localk3 to localk3s by @alexellis
438fe71 Update dependencies by @alexellis

Changes: 0.12.13...0.12.14

Generated by Derek

Print agent and server host during join command

Changelog for 0.12.13:

Commits
6b5db9e Print agent host/IP in join command by @alexellis
7dc8d01 Change streaming behaviour when joining nodes by @alexellis
92c9c3a Update README.md by @alexellis
f6129ae Revert sponsorship policy by @alexellis
b0e64c0 Update README.md by @alexellis

Changes: 0.12.12...0.12.13

Generated by Derek

Happy Christmas, but sponsor me if you want to see me work on K3sup.

Changelog for 0.12.12:

Commits
02c7a77 Rename no-deploy to disable by @alexellis

Changes: 0.12.11...0.12.12

Generated by Derek

Release with Go 1.19

Changelog for 0.12.11:

• PR #395 Bump GH Workflows to use Go 1.19 by @rgee0

Commits
b2d7446 Bump GH Workflows to use Go 1.19 by @rgee0
a1fba7a Update publish.yaml by @alexellis

Changes: 0.12.10...0.12.11

Generated by Derek

Release with --server-url for join command

Changelog for 0.12.10:

Commits
769a8e8 Fix tests with extra parameter by @alexellis

Changes: 0.12.9...0.12.10

Generated by Derek

Release with --server-url for join command

Changelog for 0.12.9:

Commits
6831034 Add server-url for use with HA IP by @alexellis
c5b8dc0 Only print out stderr with --local if there's a non-zero exit by @alexellis

Changes: 0.12.8...0.12.9

Generated by Derek

Optimise output when running install with --local

Changelog for 0.12.8:

Commits
018b1a0 Document the ready command by @alexellis

Changes: 0.12.7...0.12.8

Generated by Derek

Add quiet flag for k3sup ready command

Changelog for 0.12.7:

Commits
e3ff08c Fix issue with string being quoted in ready command by @alexellis

Changes: 0.12.6...0.12.7

Generated by Derek

Update to experimental ready command

Changelog for 0.12.6:

Commits
3c61b1f Fix ready command by @alexellis

Changes: 0.12.5...0.12.6

Generated by Derek

Add experimetnal "ready" command

Changelog for 0.12.5:

Commits
0aaae97 Add experimental ready feature by @alexellis

Changes: 0.12.4...0.12.5

Generated by Derek