Mark deprecated SSL settings as obsolete (#147)

* Mark deprecated SSL settings as obsolete

This commit marks the following SSL settings as obsolete:

'cacert', 'client_cert', 'client_key', 'keystore', 'truststore',
'keystore_password', 'truststore_password', 'keystore_type' and
'truststore_type'.

Fixed unit tests on Logstash 8.x (#146)

Unit tests were failing due to a new requirement to include the `rackup`
gem. This commit includes the version of `rackup` prior to the Fiber based rework,
as that was causing test failures.

This commit also ensures that the request body is rewound before being read in tests.

Add ssl_enabled option (#144)

This commit added the `ssl_enabled` option by bumping the `logstash-mixin-http_client` to >= 7.4.0

add response body logging to non 2xx responses (#142)

Standardize SSL settings (#140)

This commit standardizes the SSL settings by bumping the logstash-mixin-http_client version to >= 7.3.0, which:

- Adds standardized SSL settings and deprecates their non-standard counterparts. Deprecated settings will continue to work, and will provide pipeline maintainers with guidance toward using their standardized counterparts
- Adds new ssl_truststore_path, ssl_truststore_password, and ssl_truststore_type settings for configuring SSL-trust using a PKCS-12 or JKS trust store, deprecating their truststore, truststore_password, and truststore_type counterparts.
- Adds new ssl_certificate_authorities setting for configuring SSL-trust using a PEM-formatted list of certificate authorities, deprecating its cacert counterpart.
Adds new ssl_keystore_path, ssl_keystore_password, and ssl_keystore_type settings for configuring SSL-identity using a PKCS-12 or JKS key store, deprecating their keystore, keystore_password, and keystore_type counterparts.
- Adds new ssl_certificate and ssl_key settings for configuring SSL-identity using a PEM-formatted certificate/key pair, deprecating their client_cert and client_key counterparts.
- Adds the ssl_cipher_suites option

Feat: added `ssl_supported_protocols` option (#131)

Co-authored-by: Karen Metts <[email protected]>

Fix retry indefinitely in termination process (#129)

The shutdown process is blocked when `url` points to an invalid host:port. This commit checks pipeline shutdown state to quit retry loop. This feature requires logstash-core that exposes `pipeline_shutdown_requested?`

Co-authored-by: Ry Biesemeyer <[email protected]>

Add "Connection Reset by peer" unknown exceptions to retryable except… (

#127)

* Add "Connection Reset by peer" unknown exceptions to retryable exceptions

When a "connection reset by peer" is encountered, a Manticore::UnknownException is thrown.
This commit adds this to the list of exceptions where retries will be attempted rather than
dropping the event.

* Add "Read Timed out" to list of retyable unknown exceptions

Feat: support ssl_verification_mode => 'full' / 'none' (#126)

* Refactor: confusing "will retry" log when retry is off

* Refactor: drop the log prefix we already have one

Co-authored-by: Karen Metts <[email protected]>

reduce amount of default logging on a failed request (#122)

* hide headers, body and backtrace
* these are shown if log.level is debug
* bump version to 5.2.5