0376ef36a1
This is the same as json_dispatch_user_group_name() but fills in the string as "const char*" to the JSON field. Or in other words, it's what sd_json_dispatch_const_string() is to sd_json_dispatch_string(). Note this drops the SD_JSON_STRICT flags from various dispatch tables for these fields, and replaces this by SD_JSON_RELAX, i.e. the opposite behaviour. As #34558 correctly suggests we should validate user names in lookup functions using the lax rules, rather than the strict ones, since clients not knowing the rules might ask us for arbitrary resolution. (SD_JSON_RELAX internally translates to valid_user_group_name() with the VALID_USER_RELAX flag). See: #34558
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