When looking up a key in no-touch mode, `LOOKUP_NOTOUCH` is set to avoid
updating the last access time in `lookupKey`. An exception must be made
for the `TOUCH` command which must always update the key.
When called from a script, `server.executing_client` will point to the
`TOUCH` command, while `server.current_client` will point to e.g. an
`EVAL` command. So, we must use the former to find out the currently
executing command if defined.
This fix addresses the issue where TOUCH wasn't updating key access
times when called from scripts like EVAL.
Fixes#1498
Signed-off-by: Simon Baatz <gmbnomis@gmail.com>
Co-authored-by: Binbin <binloveplay1314@qq.com>
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