[NEW TOOL] Mail Subject RFC 1342 Converter

[jasoncheng7115]

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What tool do you want? Mail subject code-switcher, especially in multi-language situations

Describe the solution you'd like You can choose the charset (such as utf8, big5 ... and so on), and the encoding of the selected text (Base64 or Quoted-printable).

Is their example of this tool in the wild? It has the format: =?charset?encoding?encoded-text?= For example, the 中文 string is encoded with UTF-8 charaset and Base64 and the result is =?UTF-8?B?5Lit5paH?=, Conversely, the coded results can be parsed back to the original text.

This tool will be very useful for administrators or users of multilingual mail systems when troubleshooting :)

[sharevb]

Hi @jasoncheng7115 and @CorentinTh, implemented in #930