20cdc2b Fix importmulti bug when importing an already imported key (Pedro Branco)
405e069 Update importprivkey named args documentation (Dusty Williams)
c94527a [Docs] Update Windows build instructions for using WSL and Ubuntu 17.04 (fanquake)
27e861a net: Improve and document SOCKS code (Wladimir J. van der Laan)
dea3b87 Add new step to clean $PATH var by removing /mnt specific Window's %PATH% paths that cause issues with the make system (Donal OConnor)
a43be5b rpc: Prevent `dumpwallet` from overwriting files (Wladimir J. van der Laan)
b6c0209 Fix validationinterface build on super old boost/clang (Matt Corallo)
6a62c74 qt: Backup former GUI settings on `-resetguisettings` (Wladimir J. van der Laan)
0fe2a9a when clearing addrman clear mapInfo and mapAddr (Gregory Sanders)
6b4d9f2 wallet: update stored witness in AddToWallet (Suhas Daftuar)
62d18cd doc: Prepare release notes for 0.15.1 (MarcoFalke)
8b61aee Put back inadvertently removed copyright notices (Paul Berg)
75997c3 Disallow uncompressed pubkeys in bitcoin-tx [multisig] output adds (Matt Corallo)
8d13b42 Replace save|restoreWindowGeometry with Qt functions (MeshCollider)
6642558 [Qt] Add delay before filtering transactions Fixes 3141 (Lucas Betschart)
19d63e8 Remove custom fee radio group (Andrew Chow)
b1a6c94 rpc: make estimatesmartfee argument naming consistent with documentation (Wladimir J. van der Laan)
921542e rpc: update cli for estimatefee argument rename (Wladimir J. van der Laan)
2e31b1d Fix division by zero in time remaining (MeshCollider)
47c02a8 qt: Use IsMine to validate custom change address (Chris Moore)
7310f1f [Qt] Fix display of package name on 'open config file' tooltip (Daniel Edgecumbe)
2cb720a Acquire cs_main lock before cs_wallet during wallet initialization (Russell Yanofsky)
b278a43 rpc: Write authcookie atomically (Wladimir J. van der Laan)
50bd3f6 Avoid returning a BIP9Stats object with uninitialized values (practicalswift)
9e8aae3 [wallet] Close DB on error. (Karl-Johan Alm)

Pull request description:

  This mostly backports various commits that fix(ed) bugs and issues.

  However, it also includes two patches for qt that only fix minor issues,
  as well as some doc patches.

Tree-SHA512: 5165e309faf6b4395fdf2f6662ccc0d58306971f3769e675504f17b2055efe29b2919f22d0dbf78c4c2dc7fd5c9d08a2c53345615e4a1df73914526687c9d571