Automatic TLS Certificate Reload

[satheeshaGowda]

The issue being addressed - https://github.com/valkey-io/valkey/issues/2649

[satheeshaGowda]

Will add the test if the proposal is accepted .

[zuiderkwast]

In which way is this different to #1870? Please review and compare.

[madolson]

@satheeshaGowda I think this is a good feature to work on. Based on the last discussion, I think the two important things to incorporate are:

1. Not re-loading the certificate if it is the same.
2. Doing the parsing off the main thread, since it can be CPU intensive.

[YiwenZhang12]

Thanks for the initial work on this @satheeshaGowda ! Since the original author has left the company, I’ll be taking this effort forward and will handle any remaining updates or follow-ups.