Uninitialized data potentially used in `rpc/blockchain.cpp`:

```
static UniValue BIP9SoftForkDesc(const Consensus::Params& consensusParams, Consensus::DeploymentPos id)
{
    ...
    const ThresholdState thresholdState = VersionBitsTipState(consensusParams, id);
    ...
    if (THRESHOLD_STARTED == thresholdState)
    {
        UniValue statsUV(UniValue::VOBJ);
        BIP9Stats statsStruct = VersionBitsTipStatistics(consensusParams, id);
        statsUV.push_back(Pair("period", statsStruct.period));
        statsUV.push_back(Pair("threshold", statsStruct.threshold));
        statsUV.push_back(Pair("elapsed", statsStruct.elapsed));
        statsUV.push_back(Pair("count", statsStruct.count));
        statsUV.push_back(Pair("possible", statsStruct.possible));
        rv.push_back(Pair("statistics", statsUV));
    }
    ...
    return rv;
}
```

Github-Pull: bitcoin#10957
Rebased-From: 3eb53b8

Use POSIX rename atomicity at the `bitcoind` side to create a working
cookie atomically:

- Write `.cookie.tmp`, close file
- Rename `.cookie.tmp` to `.cookie`

This avoids clients reading invalid/partial cookies as in bitcoin#11129.

Github-Pull: bitcoin#11131
Rebased-From: 82dd719

CWallet::MarkConflicted may acquire the cs_main lock after
CWalletDB::LoadWallet acquires the cs_wallet lock during wallet initialization.
(CWalletDB::LoadWallet calls ReadKeyValue which calls CWallet::LoadToWallet
which calls CWallet::MarkConflicted). This is the opposite order that cs_main
and cs_wallet locks are acquired in the rest of the code, and so leads to
POTENTIAL DEADLOCK DETECTED errors if bitcoin is built with -DDEBUG_LOCKORDER.

This commit changes CWallet::LoadWallet (which calls CWalletDB::LoadWallet) to
acquire both locks in the standard order. It also fixes some tests that were
acquiring wallet and main locks out of order and failed with the new locking in
CWallet::LoadWallet.

Error was reported by Luke Dashjr <[email protected]> in
https://botbot.me/freenode/bitcoin-core-dev/msg/90244330/

Github-Pull: bitcoin#11126
Rebased-From: de9a1db

Github-Pull: bitcoin#11198
Rebased-From: 14ccd4d

(cherry picked from commit c41224d)

Github-Pull: bitcoin#11247
Rebased-From: a1ea1cf

Github-Pull: bitcoin#11237
Rebased-From: 3b69a08

The first argument of estimatesmartfee was renamed from nblocks to
conf_target in 06bcdb8. Update the
client-side table as well.

Github-Pull: bitcoin#11267
Rebased-From: 24697c4

Github-Pull: bitcoin#11267
Rebased-From: 5acd82d

Removes the extraneous custom fee radio group and its single radio
button. The radio button is replaced with a label that has the
radio button's text.

Github-Pull: bitcoin#11334
Rebased-From: e53fa4a

Fixes 3141

Github-Pull: bitcoin#11015
Rebased-From: 7b137ac

Github-Pull: bitcoin#11335
Rebased-From: 13baf72

Github-Pull: bitcoin#11377
Rebased-From: 28d4542

In an abundance of caution this restores "Bitcoin Developers" to the COPYING file in
case there were contributors before that point in time that would object to the
current label.  It's harmless and more pedantically correct.

[Change extracted from the Bitcoin-abc repository, commit message by gmaxwell]

Signed-off-by: Gregory Maxwell <[email protected]>

Github-Pull: bitcoin#11318
Rebased-From: d552ed6

Github-Pull: bitcoin#11252
Rebased-From: b86a420

Writes the GUI settings to `guisettings.bak` in the data directory
before wiping them. This can be used to retroactively troubleshoot
issues (e.g. bitcoin#11262) where `-resetguisettings` solves the problem.

Github-Pull: bitcoin#11338
Rebased-From: 723aa1b

This should fix all the non-dependancy issues for termux builds.
See Github issue bitcoin#11388.

Github-Pull: bitcoin#11440
Rebased-From: 96c2ce9

Prevent arbitrary files from being overwritten. There have been reports
that users have overwritten wallet files this way. It may also avoid
other security issues.

Fixes bitcoin#9934. Adds mention to release notes and adds a test.

Github-Pull: bitcoin#9937
Rebased-From: 0cd9273

Make the SOCKS code more consistent, and document the constants used.

Github-Pull: bitcoin#11397
Rebased-From: 22f816e

Github-Pull: bitcoin#11437
Rebased-From: 696ce46

Fixes bitcoin#11462. Updated documentation for importprivkey function to use the correct name for the first argument.
Also updates a call to importprivkey to use named args in functional test.

Github-Pull: bitcoin#11465
Rebased-From: aa57590