ICU-13845 Windows timezone detection: When DST is off, map to an Etc/GMT+-hh zone.

The Windows 'Date and Time' Control Panel has a setting for "Automatically
adjust clock for DST". When this setting is manually unchecked, the DST
setting is considered OFF, and the clock does not adjust for DST.

This change detects when the setting is OFF and uses the non-DST offset
to map to an Etc/GMT+-hh zone.

- Also refactor uprv_detectWindowsTimeZone

Co-authored-by: Jungshik Shin <jshin@chromium.org>
1 file changed
tree: 620aca488e568d757f41486fe28c0f44297d61bf
  1. .ci-builds/
  2. .github/
  3. docs/
  4. icu4c/
  5. icu4j/
  6. tools/
  7. vendor/
  8. .appveyor.yml
  9. .cpyskip.txt
  10. .gitattributes
  11. .gitignore
  12. .travis.yml
  13. KEYS
  14. README.md
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