Rename the 'dontloglegacyconnerr' option to 'log-error-via-logformat'
which is much more self-explanatory and readable.
Note: only legacy keywords don't use hyphens, it is recommended to
separate words with them in new keywords.
Disable the new ssl_errors.vtc reg-tests because in does not work
correctly on the CI since it requires a version of OpenSSL which is
compatible with TLSv1.3 and the ciphersuites keyword.
This reg-test checks that the connection and SSL sample fetches related
to errors are functioning properly. It also tests the proper behaviour
of the default HTTPS log format and of the log-legacy-conn-error option
which enables or disables the output of a special error message in case
of connection failure (otherwise a line following the configured
log-format is output).
William Lallemand
Remi Tricot-Le Breton