[geary] (11 commits) ...Merge branch 'wip/791275-mailsploit-mitigation'. Fixes Bug 791275.

[Michael Gratton <mjog src gnome org>]

Summary of changes:

  294bf14... Explicitly close the Serializer's buffer stream. (*)
  f6b4b5c... Update monitoring for new mail when folder special type cha (*)
  71e0e68... Check for spoofed sender addresses, only display the addres (*)
  8810e95... Ensure mailbox addresses escaped correctly when formatted a (*)
  8a1906f... Ensure encoded mailbox addresses are decoded correctly. (*)
  178ce35... Fix MailboxAddresses.to_rfc822_string formatting, add unit  (*)
  40b460d... Tidy up MailboxAddress{es} source and API a bit. (*)
  eb63505... Indicate spoofed emails in both conversation viewer and lis (*)
  02ea019... Explicitly close the Serializer's buffer stream.
  de0618e... Update monitoring for new mail when folder special type cha
  b7eea85... Merge branch 'wip/791275-mailsploit-mitigation'. Fixes Bug 

(*) This commit already existed in another branch; no separate mail sent