GitLab

* Split start_ssl_client into two phases; to allow the implementation of protocols that use some sort of in-band STARTTLS or STARTSSL signal to upgrade a plaint text connection to SSL/TLS. Examples of these protocols are XMPP, SMTP and various database TCP connections.

* Remove removed setTimeout that was accidentally included (was removed for IDF >=5), bring timeout inline with the other timeouts (ints), fix cert/key checks to look if there is actually something there (all issues caught by the CI/CD on windows-latest

* Quell compiler warning; use the right timeout

* Newer versions of MBEDTLS make the client key struct private (and most of the x509 struct too), so absent of a non-null pointer we cannot check wether it is populated. Solve this by looking at the version (as 0 is not a valid x509 version).

* Fix another \(rightfull\) compiler warning iwth the version pointer

* Quell CI/CD runs on non-WiFi supporting hardare

* Quell CI/CD runs on non-WiFi supporting hardare

* Fix typo in directory name

* Apply suggestions from code review
Co-authored-by: Jan Procházka <90197375+P-R-O-C-H-Y@users.noreply.github.com>

* Rename Files

* Remove leftover file

---------
Co-authored-by: Me No Dev <me-no-dev@users.noreply.github.com>
Co-authored-by: Jan Procházka <90197375+P-R-O-C-H-Y@users.noreply.github.com>
Co-authored-by: Lucas Saavedra Vaz <32426024+lucasssvaz@users.noreply.github.com>