Copied description in p5-Sisimai/lib/Sisimai/RFC5322.pm to lib/sisimai/rfc5322.rb
Copied description in p5-Sisimai/lib/Sisimai/RFC5322.pm to lib/sisimai/rfc5322.rb

azumakuniyuki/rb-Sisimai,azumakuniyuki/rb-Sisimai