doc: replace server.close() which don't exist in code snippets in tls.md

[oyyd]

Replace server.close() as the server don't exist in the code snippets in tls.md.

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• documentation is changed or added
• commit message follows commit guidelines

[lpinca]

Linter complains about missing semicolons.

[Trott]

Not opposed to this change, but I think we can do even better. The comment above the code samples says it implements an "echo server". The client is connecting on port 8000 to localhost but that is not explained. The code samples might be improved by adding the server code (listening on loclahost port 8000) and leaving server.close() in there. Alternatively, update the comment above the code samples to indicate what is actually being implemented there. Might be worth doing some git archaeology to see if the server code used to be there and was removed.

[Trott]

(I guess since this is documenting connect() and not a server function, maybe leave the server implementation out but add a comment explaining that it assumes a server listening on port 8000 etc.?)

[Trott]

LGTM. I left some comments about other stuff that can be done to improve this particular bit of sample code, and that can certainly happen in this PR, but it can also happen in a subsequent PR or not at all.

[lpinca]

I agree, this sentence The following implements a simple "echo server" example: followed by the client example is a bit confusing.

[oyyd]

Thanks for your advice. Let me improve it a bit.

[oyyd]

The following implements a simple "echo server" example:

This sentence seems to be changed by accident in 1b6a468.
I have changed the original sentence a bit as the "echo server" is described in the following.

[lundibundi]

Light CI: https://ci.nodejs.org/job/node-test-pull-request-lite-pipeline/1113/

[vsemozhetbyt]

Landed in 0544816
Thank you!