Eclipse Californium (Cf) CoAP Framework 3.12.0

Minor release 3.12 comes with some fixes handling credentials and fills the start/stop gap in handling observes on the server side.

The new cloud-demo-server and the copa-s3-proxy will also be included as a beta version.

As for now, it is considered to be the last minor release for the 3 and I would like to startover to develop the 4.0.0. Though that may take a while until a 4.0.0 gets released, we will see, if we that consideration works, or if other 3 minor releases are required. 

• 722b2a367 2023-03-03 Add coap-S3-proxy.
• cfffbd18e 2022-08-04 Add cloud demo server.
• 9f7d5dfff 2024-05-16 Fix truncateTail.
• d30df81ba 2024-04-25 Use unit-test's logger instead of coap-resource's logger.
• 6bd39c754 2024-04-25 Fix stop/start for observe-relations.
• 1aae0e482 2024-05-02 Handle unexpected exceptions in SystemResourceMonitors.
• b47776dea 2024-04-17 SystemResourceMonitors: add addOptionalMonitor.
• 2d0ffed51 2024-04-19 Make Credentials destroyable.
• f0cda363f 2024-04-15 Asn1DerDecoder: improve support for PKCS #8 EC private key.
• 767da68e4 2024-04-15 unix-setup/fail2ban: fix failregex for BAN.
• 4299aaaa1 2024-04-12 SslContextutil/PEM: add "ignored" to "not supported" log message.
• 26042c6f2 2024-04-12 Asn1DerDecoder: fix use of deprecated name.
• 2a921959f 2024-04-02 Suppress warnings using m2e ignore.
• a6e16f781 2024-04-02 EncryptedStreamUtil: fix typo in javadoc.
• 1d6a900cb 2024-03-26 StringUtil: add truncate ignoring character case.
• 0467b86e5 2024-03-22 Add java 8 support for destroy PrivateKeys.
• d809bf48a 2024-03-22 Add support to read PEM from Readers.
• 56e837880 2024-03-22 Restore additional info on reloading connections.
• a2f7be3bd 2024-03-25 Remove unused custom argument from CertificateIdentityResult.
• b02535cc9 2024-03-14 Fix eddsa support for java 11.