query_spf_record doesn't raise MultipleSPFRTXTRecords exception

[thesyst]

If a domain has multiple spf-records, function _query_spfrecord correctly figuring this out, but fails to raise MultipleSPFRTXTRecords exception, raising SPFRecordNotFound instead.

Also, there is no mentioning in the documentation that any of spf-related functions could raise MultipleSPFRTXTRecords exception.

[seanthegeek]

Turns out this was fixed ages ago.