2e9406c Interrupt loading thread after shutdown request (João Barbosa)
Pull request description:
This change (currently) avoids loading the mempool if shutdown is requested.
Tree-SHA512: 3dca3a6ea5b09bd71db0974584d93dfe81819bc0bdbb4d9b6fa0474755306d1403f6c058ecb8211384493a8f7ca3a9134173db744b7344043cfc7d79286c8fd4
Backport of Core PR 12415
https://github.com/bitcoin/bitcoin/pull/12415/files