GH-15354: Consul backend security options

[loicalbertin]

As per GH-15354 this pull-request allow to specify ca_file cert_file and key_file in order to interact with a secured Consul backend.

Tested with consul 0.8.4

[loicalbertin]

Note: this pull-request doesn't include proper unit tests because it would require to update the Consul dependency to v0.8+ in order to run a secured consul test server and I don't know your policy about those kind of upgrades.

[loicalbertin]

Hi @apparentlymart,

Could you please review this pull-request please or ping someone that could do it.
Changes are very limited and it is IMHO an important security improvement.

Thanks & have a nice day!

[apparentlymart]

Hi @loicalbertin! Thanks for working on this and sorry it got delayed by the 0.10.0 release work.

This looks great to me!

[loicalbertin]

Hi @apparentlymart
No problem for the delay. I'm glad to see this merged and proud to add a very modest contribution to this great project! 😄
Thanks!

[ghost]

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