e7fb7296f5
Rename nspawn's --user=NAME option to --uid=NAME for selecting the container user. The -u short option is preserved. --user=NAME and --user NAME are still accepted but emit a deprecation warning. A pre-parsing step stitches the space-separated --user NAME form into --user=NAME before getopt sees it, preserving backwards compatibility despite --user now being an optional_argument. Repurpose --user (without argument) and --system as standalone switches for selecting the runtime scope (user vs system service manager). Replace all uses of the arg_privileged boolean with arg_runtime_scope comparisons throughout nspawn. The default scope is auto-detected from the effective UID. Co-developed-by: Claude Opus 4.6 <noreply@anthropic.com>
System and Service Manager
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