The SHUTDOWN command has various flags to change it's default behavior,
but in some cases establishing a connection to redis is complicated and it's easier
for the management software to use signals. however, so far the signals could only
trigger the default shutdown behavior.
Here we introduce the option to control shutdown arguments for SIGTERM and SIGINT.
New config options:
`shutdown-on-sigint [nosave | save] [now] [force]`
`shutdown-on-sigterm [nosave | save] [now] [force]`
Implementation:
Support MULTI_ARG_CONFIG on createEnumConfig to support multiple enums to be applied as bit flags.
Co-authored-by: Oran Agra <oran@redislabs.com>
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