RFR: 8294987: Streamline DerOutputStream write

Fri Oct 7 16:04:04 UTC 2022

Return `this` in various output methods so you can write something like

        new DerOutputStream().putInteger(1)
                .putOctetString("12345".getBytes(StandardCharsets.UTF_8))
                .write(AlgorithmId.get("ed25519"))
                .writeImplicit((byte)0x80, new DerOutputStream().putUnalignedBitString(ba)).toByteArray();

No regression test. Trivial pure enhancement.

-------------

Commit messages:
 - code change

Changes: https://git.openjdk.org/jdk/pull/10608/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10608&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294987
  Stats: 91 lines in 1 file changed: 30 ins; 18 del; 43 mod
  Patch: https://git.openjdk.org/jdk/pull/10608.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10608/head:pull/10608

PR: https://git.openjdk.org/jdk/pull/10608