doc: Add historical release notes for 0.16.3

doc/release-notes/release-notes-0.16.3.md

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+Bitcoin Core version 0.16.3 is now available from:
+
+  <https://bitcoincore.org/bin/bitcoin-core-0.16.3/>
+
+This is a new minor version release, with various bugfixes.
+
+Please report bugs using the issue tracker at GitHub:
+
+  <https://github.com/bitcoin/bitcoin/issues>
+
+To receive security and update notifications, please subscribe to:
+
+  <https://bitcoincore.org/en/list/announcements/join/>
+
+How to Upgrade
+==============
+
+If you are running an older version, shut it down. Wait until it has completely
+shut down (which might take a few minutes for older versions), then run the
+installer (on Windows) or just copy over `/Applications/Bitcoin-Qt` (on Mac)
+or `bitcoind`/`bitcoin-qt` (on Linux).
+
+The first time you run version 0.15.0 or newer, your chainstate database will be converted to a
+new format, which will take anywhere from a few minutes to half an hour,
+depending on the speed of your machine.
+
+Note that the block database format also changed in version 0.8.0 and there is no
+automatic upgrade code from before version 0.8 to version 0.15.0 or higher. Upgrading
+directly from 0.7.x and earlier without re-downloading the blockchain is not supported.
+However, as usual, old wallet versions are still supported.
+
+Downgrading warning
+-------------------
+
+Wallets created in 0.16 and later are not compatible with versions prior to 0.16
+and will not work if you try to use newly created wallets in older versions. Existing
+wallets that were created with older versions are not affected by this.
+
+Compatibility
+==============
+
+Bitcoin Core is extensively tested on multiple operating systems using
+the Linux kernel, macOS 10.8+, and Windows Vista and later. Windows XP is not supported.
+
+Bitcoin Core should also work on most other Unix-like systems but is not
+frequently tested on them.
+
+Notable changes
+===============
+
+Denial-of-Service vulnerability
+-------------------------------
+
+A denial-of-service vulnerability (CVE-2018-17144) exploitable by miners has
+been discovered in Bitcoin Core versions 0.14.0 up to 0.16.2. It is recommended
+to upgrade any of the vulnerable versions to 0.16.3 as soon as possible.
+
+0.16.3 change log
+------------------
+
+### Consensus
+- #14249 `696b936` Fix crash bug with duplicate inputs within a transaction (TheBlueMatt, sdaftuar)
+
+### RPC and other APIs
+- #13547 `212ef1f` Make `signrawtransaction*` give an error when amount is needed but missing (ajtowns)
+
+### Miscellaneous
+- #13655 `1cdbea7` bitcoinconsensus: invalid flags error should be set to `bitcoinconsensus_err` (afk11)
+
+### Documentation
+- #13844 `11b9dbb` correct the help output for -prune (hebasto)
+
+Credits
+=======
+
+Thanks to everyone who directly contributed to this release:
+
+- Anthony Towns
+- Hennadii Stepanov
+- Matt Corallo
+- Suhas Daftuar
+- Thomas Kerin
+- Wladimir J. van der Laan
+
+And to those that reported security issues:
+
+- (anonymous reporter)
+