fix: Fix CVE-2026-96512

[wxphaha]

sudoers NOTBEFORE/NOTAFTER time-window bypass via TZ

• Ignore the user-specified TZ environment variable when evaluating NOTBEFORE/NOTAFTER timestamps (unsetenv TZ before tzset)
• Copy environ[] away from envp[] so plugins still receive the original environment (TZ remains available for the command itself)
• Backport upstream commits db669167 and 1820a34

Upstream: https://security-tracker.debian.org/tracker/CVE-2026-96512

[deepin-ci-robot]

Hi @wxphaha. Thanks for your PR. 😃

[github-actions]

TAG Bot

TAG: 1.9.16p2-3deepin3
EXISTED: no
DISTRIBUTION: unstable

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[deepin-ci-robot]

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[Zeno-sole]

/integrate

[github-actions]

AutoIntegrationPr Bot
auto integrate with pr url: deepin-community/Repository-Integration#4609
PrNumber: 4609
PrBranch: auto-integration-36712455382