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Add ß (Latin small letter sharp s) to .de domain IDNA check #610
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The ß was introduced in the Unicode® Technical Standard #46 standard. According to denic.de this is a valid character.
In the IDNA2003 standard the ß character is not included. This result in a false positive check. IMHO the IDNA2003 will be replaced soon with IDNA2008 and this is a minor side effect.