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* common : relax sampler name matching Currently, in some cases, the alternative names for samplers (like `top-k` and `min-p` instead of the canonical `top_k` and `min_p`) are not always recognized by the `common_sampler_types_from_names` function in `common/sampling.cpp`. This PR changes the signature of this function to remove the `bool allow_alt_names` flag, and removes all occurences of the flag from call sites. Therefore, the function will now always match all known names. I also changed the logic of the function to unconditionally check the provided sampler names against both the canonical and alternative names, and to be case-insensitive. This fixes an issue I was seeing wherein samplers specified in the `llama-server` UI were not recognized as valid when the alternative names were used. * add more alt names * cont. fix * cast to unsigned char for correctness * common : unify sampler name mapping * annotate canonical vs. alt sampler name mappings per @CISC * Update common/sampling.cpp Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com> * common : auto-generate sampler name aliases per @ngxson * use merged map for matching * use `.merge` instead of iterating * nit: simplify comment * nit: use insert everywhere, not index assignment --------- Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>