[aniket866]

Added TLSExplicit bool field to Server struct with omitempty so it's absent in old YAML files. When absent (false), the persisted insecureTLS value is untrusted (because the old login always wrote true unconditionally).

NewClient now:

• Reads context's TLSExplicit : only honours InsecureTLS from the saved context when TLSExplicit == true; warns and ignores it for legacy configs
• Computes effectiveInsecure : config.InsecureTLS (CLI flag) OR c.InsecureTLS (context), so later commands using a saved --insecure-tls context work without repeating the flag

Closes #286

Ai disclosure: chatgpt is used to reveiw related files and do required changes.

[Caesarsage]

Thanks @aniket866! mynk8 still has #287 open for this, so please coordinate with them there. If there's no reply by Nov 6, feel free to reopen this; otherwise pick another triage/accepted issue.