Fill in rest of release notes

doc/release-notes.md

@@ -2,7 +2,8 @@ Bitcoin Core version 0.12.1 is now available from:
 
   <https://bitcoin.org/bin/bitcoin-core-0.12.1/>
 
-This is a new major version release, bringing new features and other improvements.
+This is a new minor version release, including the BIP9, BIP68 and BIP112
+softfork, various bugfixes and updated translations.
 
 Please report bugs using the issue tracker at github:
 
@@ -146,31 +147,50 @@ behavior, not code moves, refactors and string updates. For convenience in locat
 the code changes and accompanying discussion, both the pull request and
 git merge commit are mentioned.
 
-### RPC and REST
-
-### Configuration and command-line options
+### RPC and other APIs
+- #7739 `7ffc2bd` Add abandoned status to listtransactions (jonasschnelli)
 
 ### Block and transaction handling
+- #7543 `834aaef` Backport BIP9, BIP68 and BIP112 with softfork (btcdrak)
 
 ### P2P protocol and network code
+- #7804 `90f1d24` Track block download times per individual block (sipa)
+- #7832 `4c3a00d` Reduce block timeout to 10 minutes (laanwj)
 
 ### Validation
+- #7821 `4226aac` init: allow shutdown during 'Activating best chain...' (laanwj)
 
 ### Build system
+- #7487 `00d57b4` Workaround Travis-side CI issues (luke-jr)
+- #7606 `a10da9a` No need to set -L and --location for curl (MarcoFalke)
+- #7614 `ca8f160` Add curl to packages (now needed for depends) (luke-jr)
+- #7776 `a784675` Remove unnecessary executables from gitian release (laanwj)
 
 ### Wallet
-
-### GUI
-
-### Tests and QA
+- #7715 `19866c1` Fix calculation of balances and available coins. (morcos)
 
 ### Miscellaneous
+- #7617 `f04f4fd` Fix markdown syntax and line terminate LogPrint (MarcoFalke)
+- #7747 `4d035bc` added depends cross compile info (accraze)
+- #7741 `a0cea89` Mark p2p alert system as deprecated (btcdrak)
+- #7780 `c5f94f6` Disable bad-chain alert (btcdrak)
 
 Credits
 =======
 
 Thanks to everyone who directly contributed to this release:
 
+- accraze
+- Alex Morcos
+- BtcDrak
+- Jonas Schnelli
+- Luke Dashjr
+- MarcoFalke
+- Mark Friedenbach
+- NicolasDorier
+- Pieter Wuille
+- Suhas Daftuar
+- Wladimir J. van der Laan
 
 As well as everyone that helped translating on [Transifex](https://www.transifex.com/projects/p/bitcoin/).