allow native certs (#892)

This should allow customers using SSL_CERT_FILE env var or installing
certs on the OS to be automatically used instead of the web public key
infrastructure.

This supports a customer with a use case requiring them to decrypt
telemetry data on their proxy.

Author: astuyve

bottlecap/Cargo.toml

@@ -97,7 +97,7 @@ opt-level = 3
 tikv-jemallocator = "0.5"
 
 [features]
-default = ["reqwest/rustls-tls", "dogstatsd/default", "datadog-fips/default" ]
+default = ["reqwest/rustls-tls-native-roots", "dogstatsd/default", "datadog-fips/default" ]
 fips = [
     "ddcommon/fips",
     "datadog-trace-utils/fips",