German: Use post-reform rules

Allows users to choose a particular spellchecking style; Pre-reform or post reform.

Supported on: At least Windows 7
Registry HiveHKEY_CURRENT_USER
Registry Pathsoftware\policies\microsoft\shared tools\proofing tools\spelling
Value Namegermanpostreform
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

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