Github-Pull: bitcoin#20141
Rebased-From: d1292f2

Github-Pull: bitcoin#20141
Rebased-From: d1292f2

7566af4 doc: Update data directory path comments (Hennadii Stepanov)
09261de util: Add StripRedundantLastElementsOfPath function (Hennadii Stepanov)
8ef0dac macOS deploy: use the new plistlib API (Jonas Schnelli)
314e795 build: fix mutex detection when building bdb on macOS (fanquake)
1f67a30 random: fixes read buffer resizing in RandAddSeedPerfmon (Ethan Heilman)
6113b54 net: Send post-verack handshake messages at most once (MarcoFalke)
bdf15d0 rpc: Adjust witness-tx deserialize error message (MarcoFalke)
731502a rpc: Properly deserialize txs with witness before signing (MarcoFalke)
ee0082b Avoid the use of abs64 in timedata (Pieter Wuille)
05bd0c2 docs: Correct description for getblockstats's txs field (Nadav Ivgi)

Pull request description:

  Backports the following PRs to the 0.20 branch:
  * #19777 - docs: Correct description for getblockstats's txs field
  * #19836 - rpc: Properly deserialize txs with witness before signing
  * #20080 - Strip any trailing `/` in -datadir and -blocksdir paths
  * #20082 - [bugfix] random: fixes read buffer to use min rather than max
  * #20141 - Avoid the use of abs64 in timedata
  * #20146 - net: Send post-verack handshake messages at most once
  * #20195 - build: fix mutex detection when building bdb on macOS
  * #20298 - macOS deploy: use the new plistlib API

  Will add additional commits as they become available.

ACKs for top commit:
  MarcoFalke:
    review ACK 7566af4 🗡

Tree-SHA512: add6bb978313c12c3e07bc232636ae9d1ab0edd0b816705c5c70eeb1cc04097165fd5e29d60c706886943ceb1f749a422020766b4aa2d23be51e9f839157a4bb

9c71499 rpc: Adjust witness-tx deserialize error message (MarcoFalke)
a7bdf5c rpc: Properly deserialize txs with witness before signing (MarcoFalke)
0b64310 Avoid the use of abs64 in timedata (Pieter Wuille)
5b2de04 Bump vcpkg commit ID to get new msys mirror list (Aaron Clauson)
6957419 build: set minimum required Boost to 1.48.0 (fanquake)
27bb2cc util: Don't reference errno when pthread fails. (MIZUTA Takeshi)
8bd2ab1 docs: Correct description for getblockstats's txs field (Nadav Ivgi)
a8411b3 qt: Fix QFileDialog for static builds (Hennadii Stepanov)

Pull request description:

  Backports the following to the 0.19 branch:
  * #19194 - util: Don't reference errno when pthread fails. - not clean.
  * #19536 - qt, build: Fix QFileDialog for static builds
  * #19777 - docs: Correct description for getblockstats's txs field
  * #19836 - rpc: Properly deserialize txs with witness before signing
  * #20095 - CI: Bump vcpkg commit ID to get new msys mirror list
  * #20141 - Avoid the use of abs64 in timedata
  * #20142 - [0.20] build: set minimum required Boost to 1.48.0

ACKs for top commit:
  jnewbery:
    utACK 9c71499
  dergoegge:
    utACK 9c71499
  MarcoFalke:
    ACK 9c71499

Tree-SHA512: 2151f22bc37a6a2f51a8f36c27376622016b51ff99b570e95354356fce1f1761cf19cb4f8ebfa26d38485a0bff6ff6ee834d2798fb383e2ae2abb175548b8fe6

Summary:
Issue [[bitcoin/bitcoin#20135 | core#20135]]:
> When extending the test/fuzz/integer fuzzer I noticed the following UBSan warning when fuzzing abs64(...):
> ```
> runtime error: negation of -9223372036854775808 cannot be represented in type 'int64_t' (aka 'long'); cast to an unsigned type to negate this value to itself
> ```
>
> Typically `abs(I n)` type functions are not defined when `n == std::numeric_limits<I>::min()` so it could be argued that this is expected, but perhaps the function could be rewritten in a way which guarantees that it gives the same behaviour across systems (instead of UB).

This is a backport of [[bitcoin/bitcoin#20141 | core#20141]]

Test Plan: `ninja all check-all`

Reviewers: #bitcoin_abc, majcosta

Reviewed By: #bitcoin_abc, majcosta

Differential Revision: https://reviews.bitcoinabc.org/D10460