logstash/logstash — pull request #790 by bfritz (2013-11-21 02:04:10+00:00)
Title: [imap] decode header values in RFC 2047 encoded-word format

RFC 2047 outlines an encoding for header fields. Without this change the header fields (To, From, Subject, etc.) may have values like `=?iso-8859-1?Q?abc?=` instead of `abc`.