Mxsniff

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* Fixed wildcard subdomain matching
* New service provider
* Updated PyPI classifiers

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* Fixed cache handling
* Distinguish Yandex public vs hosted email provider

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* ``mxprobe`` now distinguishes between soft and hard fails
* ``mxsniff`` command line now produces valid CSV or JSON (verbose mode)
* Verbose output now includes canonical representation of an email address to facilitate comparison

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* Fix PyPI distribution (no code changes)

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* The providers list now includes provider metadata (title, note, url)
* Public email domains are now tagged and identified in results
* A static domain list is included for very popular domains (typically public email domains)
* The command line script now handles IDN names correctly
* Email probe feature, to attempt a guess on whether the email is actually valid

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* Added support for wildcards in domain names
* Additional providers
* Detect self-hosted email servers
* Remove verbose mode in the mxsniff function; always verbose now
* Track MX TLDs
* Run queries in a multiprocess pool in the command line version