[geary] (36 commits) Non-fast-forward update to branch wip/20-cert-pinning

[Michael Gratton <mjog src gnome org>]

The branch 'wip/20-cert-pinning' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  7513691... Update Geary.ConnectivityManager to check a GSocketConnecta
  0e22c4e... Update Geary.Endpoint API and source
  d615529... Tidy up all of the various untrusted_host signals
  45c52cd... Remove now-unsed validation code from Geary.Engine
  205b511... Add Geary.ProblemType for TLS cert validation errors, clari
  8d25db3... Modernise cert prompting impl to work with new account stat
  e7889d0... Replace controller's GCR pinning impl with new CertificateM
  e672415... Don't update status for IMAP connection problems multiple t
  bbed4fb... Remove now unsed Endpoint.trust_untrusted_host prop and rel
  d0933f5... Don't block handling GTlsConnection::accept-certificate
  a906dfd... Handle untrusted certs when adding a new account
  9523cdd... Typo fix
  a1de42c... Move common account editor pane in-app notification impl to
  e346aa4... Handle untrusted certs when adding a editing account server
  410d47e... Don't prompt for untrusted host as validation when account 

Commits added to the branch:

  efe6dc9... Mark headerbar titles for translation (*)
  d9b450f... Merge branch 'piotrdrag/untranslatable-titles' into 'master (*)
  5a269a1... Update Polish translation (*)
  00da60d... Delineate tags a, b, i, and u in plaintext conversion (*)
  65116e0... Update Turkish translation (*)
  03a18fb... Merge branch 'improve-plaintext-conversion' into 'master' (*)
  a9efe8f... Add plaintext quote marker to blockquote lines in one pass (*)
  ecbc285... Add Belarusian translation (*)
  fcc658a... Merge branch 'wip/17-noisy-problem-reports' into 'master' (*)
  6db6e7a... Update POTFILES.in (*)
  6cd7f06... Consult correct GOA settings when configuring SMTP TLS meth (*)
  6ce84ae... Merge branch 'wip/182-goa-smtp-auth-method-b0rked' into 'ma (*)
  18d8478... Merge branch 'improve-plaintext-conversion' into 'master' (*)
  c9bfab4... Typo fix (*)
  7ed2898... Tidy up account editor's undo/redo action state management (*)
  fdb9243... Move common account editor pane in-app notification impl to (*)
  aa27c96... Improve account editor's doc comments (*)
  cc07e54... Allow adding/modifying an account to be cancelled when in p (*)
  db85a34... Don't validate managed accounts when validating account ser (*)
  33ae35f... Fix critical when IMAP login command is cancelled (*)
  3000334... Merge branch 'wip/account-editor-refinements-v1' into 'mast (*)
  3c89a2f... Update Geary.ConnectivityManager to check a GSocketConnecta
  19d2fdf... Update Geary.Endpoint API and source
  3f04e5e... Tidy up all of the various untrusted_host signals
  e94e466... Remove now-unsed validation code from Geary.Engine
  884500a... Add Geary.ProblemType for TLS cert validation errors, clari
  67ec69a... Modernise cert prompting impl to work with new account stat
  82c972f... Replace controller's GCR pinning impl with new CertificateM
  0d93696... Don't update status for IMAP connection problems multiple t
  1fa342c... Remove now unsed Endpoint.trust_untrusted_host prop and rel
  c0b5d44... Don't block handling GTlsConnection::accept-certificate
  2e344d7... Handle untrusted certs when adding a new account
  8179035... Handle untrusted certs when adding a editing account server
  6544ffb... Don't prompt for untrusted host as validation when account 
  f32b4e2... Simplify CertificateManager's db pinned cert management
  8e15263... Implement loading and saving certs in CertificateManager

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