Fix: Add TTL and custom Timeout in DigitalOcean DNS provider

vendor/github.com/xenolf/lego/acme/provider.go

@@ -1,28 +0,0 @@
-package acme
-
-import "time"
-
-// ChallengeProvider enables implementing a custom challenge
-// provider. Present presents the solution to a challenge available to
-// be solved. CleanUp will be called by the challenge if Present ends
-// in a non-error state.
-type ChallengeProvider interface {
-	Present(domain, token, keyAuth string) error
-	CleanUp(domain, token, keyAuth string) error
-}
-
-// ChallengeProviderTimeout allows for implementing a
-// ChallengeProvider where an unusually long timeout is required when
-// waiting for an ACME challenge to be satisfied, such as when
-// checking for DNS record progagation. If an implementor of a
-// ChallengeProvider provides a Timeout method, then the return values
-// of the Timeout method will be used when appropriate by the acme
-// package. The interval value is the time between checks.
-//
-// The default values used for timeout and interval are 60 seconds and
-// 2 seconds respectively. These are used when no Timeout method is
-// defined for the ChallengeProvider.
-type ChallengeProviderTimeout interface {
-	ChallengeProvider
-	Timeout() (timeout, interval time.Duration)
-}