[31.x] Backports + rc3 #35028

1. 
   fanquake commented at 3:33 AM on April 8, 2026: member

   Backports:

   • #35014

   Also contains a libmultiprocess subtree pull. Also bumps to rc3 + regens manpages.

2. Squashed 'src/ipc/libmultiprocess/' changes from 70f632bda8..3edbe8f67c

   3edbe8f67c Merge bitcoin-core/libmultiprocess#268: Use throwRecoverableException instead of raw throw for stored exceptions
   23be44b0d3 Use throwRecoverableException instead of raw throw for stored exceptions
   75c2a2764c Merge bitcoin-core/libmultiprocess#266: test: increase spawn test child timeout to 30 seconds
   8b5f805301 Merge bitcoin-core/libmultiprocess#267: doc: Bump version 9 > 10
   cc0b23fc32 test: increase spawn test child timeout to 30 seconds
   050f878db8 doc: Improve versions.md descriptions and formatting
   c6a288a889 doc: Bump version 9 > 10
   
   git-subtree-dir: src/ipc/libmultiprocess
   git-subtree-split: 3edbe8f67c182dde91c0050065d79ae268722489

   1bc22a38a8
3. Update libmultiprocess subtree to latest master 0df3ce87d9
4. test: remove macOS REDUCE_EXPORTS exception workaround

   The underlying issue was fixed in bitcoin-core/libmultiprocess#268.
   
   Remove the workaround that accepted degraded error messages on Darwin.
   
   Github-Pull: #35014
   Rebased-From: b555a0b789fa4f21875e4fa356cd9455aef16879

   afa8ba04e0
5. build: bump version to v31.0rc3 275843f2a6
6. doc: update manual pages for v31.0rc3 c168baec80
7. fanquake added this to the milestone 31.0 on Apr 8, 2026
8. DrahtBot added the label Backport on Apr 8, 2026
9. 
   DrahtBot commented at 3:34 AM on April 8, 2026: contributor

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10. 
    Sjors commented at 8:49 AM on April 8, 2026: member

    utACK c168baec80960a8118bdc553839f7c122e1ce471

11. fanquake marked this as ready for review on Apr 8, 2026
12. fanquake requested review from marcofleon on Apr 8, 2026
13. hebasto approved
14. 
    hebasto commented at 9:36 AM on April 8, 2026: member

    ACK c168baec80960a8118bdc553839f7c122e1ce471.

15. marcofleon approved
16. 
    marcofleon commented at 11:10 AM on April 8, 2026: contributor

    ACK c168baec80960a8118bdc553839f7c122e1ce471

17. fanquake merged this on Apr 8, 2026
18. fanquake closed this on Apr 8, 2026

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19. fanquake deleted the branch on Apr 8, 2026

Milestone
31.0