Log Message:
uthash: update to 2.3.0.

Version 2.3.0 (2021-02-25)
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* remove HASH_FCN; the HASH_FUNCTION and HASH_KEYCMP macros now behave similarly
* remove uthash_memcmp (deprecated in v2.1.0) in favor of HASH_KEYCMP
* silence -Wswitch-default warnings (thanks, Olaf Bergmann!)