fc81158 [QA] Add test_change_position case to rpc_fundrawtransaction.py (random-zebra)
dd35760 [QA] Add test_option_feerate to rpc_fundrawtransaction functional test (random-zebra)
5bca4f4 Add more clear interface for CoinControl.h regarding individual feerate (random-zebra)
169bc3b [RPC] add feerate option to fundrawtransaction (random-zebra)
87dbdf8 [QA] Test new options in rpc_fundrawtransaction functional test (random-zebra)
bc9dc67 Add lockUnspents option to fundrawtransaction (random-zebra)
a3ac191 Add change options to fundrawtransaction (random-zebra)
0c1f7ba Add strict flag to RPCTypeCheckObj (random-zebra)
d655b42 Use CCoinControl selection in CWallet::FundTransaction (random-zebra)
76c8d54 [QA] Test watchonly addrs in fundrawtransaction tests (random-zebra)
134c5d2 Implement watchonly support in fundrawtransaction (random-zebra)
1b153e5 Update importaddress help to push its use to script-only (random-zebra)
7b4eb6d Add importpubkey method to import a watch-only pubkey (random-zebra)
816dabb Add p2sh option to importaddress to import redeemScripts (random-zebra)
60a20a4 Split up importaddress into helper functions (random-zebra)
cbffa80 Add logic to track pubkeys as watch-only, not just scripts (random-zebra)
12b38b0 Add have-pubkey distinction to ISMINE flags (random-zebra)
fab6556 Exempt unspendable transaction outputs from dust checks (random-zebra)
ab407ff [Tests] Fix and enable fundrawtransaction functional tests (random-zebra)
bc44ba0 [wallet] allow transaction without change if keypool is empty (random-zebra)
a2f8071 [wallet] CreateTransaction: simplify change address check (random-zebra)
761e60e Add fundrawtransaction RPC method (random-zebra)
ccb18dd Add FundTransaction method to wallet (random-zebra)
692b827 Add DummySignatureCreator which just creates zeroed sigs (random-zebra)

Pull request description:

  based on top of
  - [x] #1662

  This introduces a new wallet function, `CWallet::FundTransaction()` (and exposes it via RPC with `fundrawtransaction`), to fill a tx containing only vouts (or not enough vins to cover the vouts) with unspent coins from the wallet.

  `fundrawtransaction` will not modify existing inputs, and will add one change output (if needed) to the outputs. It will not sign the inputs (so can include also watch-only or multi-sig inputs, if enabled).

  backported from:
  - bitcoin#6088
  - bitcoin#17219 [`*`]
  - bitcoin#6417
  - bitcoin#6444
  - bitcoin#6415
  - bitcoin#6828
  - bitcoin#7296 (only bebe58b)
  - bitcoin#7506
  - bitcoin#7518
  - bitcoin#7967

  adapting the tests for the (more recent) framework.

  [`*`] Note: this has been included to be able to call `fundrawtransaction` without the need for an unencrypted wallet (for the change address key)

ACKs for top commit:
  furszy:
    re ACK fc81158 .
  Fuzzbawls:
    ACK fc81158

Tree-SHA512: 10235ce6e672a1cfd4ae2cad9312864c82971f6a4aa1a8ed9489d85156f5c4126c293180a7f1b86b7c65d07caab484e9a6d7a87ebf032bee55adb98d3e08e7b9