This is no longer true. Files slog.[ch] were introduced in webdis codebase by mrb <firstname.lastname@example.org> and were merged into master branch by upstream developer in commit bec19d0. This file originally contained one function void slog(...) with 13 statements. 12 of these statements were copied from function void redisLog(...) from redis-server codebase (https://github.com/antirez/redis, commit aa81e4d5, file src/redis.c, 18 statements). Since that time these files were refactored and have nothing to do with the codebase it was originally based on. Not to mention current src/redis.c from redis repository greatly differs from the mentioned commit where code was borrowed from.