Addresses outstanding review comments from PR #22961 where SSL field
collection was refactored into generic_server::connection base class.
This patch consists of minor cosmetic enhancements for increased
readability, mainly, with some minor fixups explained in specific
commits.
Cosmetic changes, no need to backport.
Closesscylladb/scylladb#27575
* github.com:scylladb/scylladb:
test_ssl: fix indentation
generic_server: improve logging broken TLS connection
test_ssl: improve timeout and readability
alternator/server: update SSL comment