Update references of copyright being assigned to Salvatore when it was
transferred to Redis Ltd. as per
https://github.com/valkey-io/valkey/issues/544.
---------
Signed-off-by: Pieter Cailliau <pieter@redis.com>
Reapply this commit on top of hiredis as a local change. Previosuly it
was pulled from a private hiredis branch, which resulted with it going
away on subtree pull.
