Horton

Update some comments for fasthash

John Naylor <john.naylor@postgresql.org>

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Commit: 7892e25924719097d96940d38e3aec862adc9e59
Author: John Naylor <john.naylor@postgresql.org>
Date: 2026-01-21T07:11:40Z
Releases: 19 (unreleased) 
Update some comments for fasthash

- Add advice about hashing multiple inputs with the incremental API
- Generalize statements that were specific to C strings to include
  all variable length inputs, where applicable.
- Update comments about the standalone functions and make it easy to
  find them.

Reported-by: Robert Haas <robertmhaas@gmail.com>
Reviewed-by: zengman <zengman@halodbtech.com>
Discussion: https://postgr.es/m/CANWCAZZgKnf8dNOd_w03n88NqOfmMnMv2=D8_Oy6ADGyiMq+cg@mail.gmail.com
Discussion: https://postgr.es/m/CANWCAZa-2mEUY27xBw2TpsybpvVu3Ez4ABrHCBqZpAs_UDTj2Q@mail.gmail.com

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PathChange+/−
src/include/common/hashfn_unstable.h modified +28 −9

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