zfs: merge openzfs/zfs@a9d6b0690
Notable upstream pull request merges:
#14925 Another set of vdev queue optimizations #14964 Use big transactions for small recordsize writes #14999 ZIL: Fix another use-after-free
Obtained from: OpenZFS
OpenZFS commit: a9d6b0690b1863f39a7efce08b1227f2e9e26abb