Going to separate the the code into two parts: the code that can be landed without dependencies and the code that is dependent on D3689.

Rebase off D4103 to fix off by one error.

Changed location of FindandDelete() and restored newline.

Fix comment, removed unnecessary #include, and fixed libevent filter.

Fixed nit.

Removed punctuation at end of comment.

Rebased off D4045.

Fixed nit.

Fixed remaining instance in wallet.h.

Fixed comment.

Rebased off D4029 and added comment changes.

Will rebase off D4026 soon.

using addresses in createmultisig was deprecated in D2002 and the deprecated code was removed in D3978.

Fixed comment formatting and removed extra new line.

Corrected nits, rebased off D3464, and added changes to logging().

Rebased off D3998.

Nits fixed. Will rebase after D3997 is landed.

rpc/blockchain.cpp changes were made here: D954
rpc/mining.cpp changes were excluded because we did not backport much of Core's fee code.
Changes to rpc/misc.cpp that were excluded were to outdated logging code.
signrawtransaction() was removed after being deprecated: D3978

Rebased and added missing EXCLUSIVE_LOCKS_REQUIRED() to validation.cpp

Added an instance of EXCLUSIVE_LOCKS_REQUIRED() to wallet/wallet.cpp.

Rebased.

Fixed test method.

Fix completed by D3979.

Fixed variable type comparison warning.

Rebased.

Rebased and moved label and account function blocks inline with Core's placement.

Not a complete fix. https://github.com/bitcoin/bitcoin/pull/13159 fixes remaining issues.

Addressed nits and reverted timing.json change.

Fixed variable typing and added braces.

Removed typo.

Rebase.

util.cpp change was accidentally skipped.

function(void) -> function().

Rebased.

Fixed function(void) -> function().

I guess this was landed as D3843 while this was waiting for review.

https://github.com/bitcoin/bitcoin/issues/12915
This is supposed to introduce the above bug, but I could not build with the same configure options to test. The fix is made in D3954.