[libsecret] (14 commits) Non-fast-forward update to branch wip/dueno/backend

[Daiki Ueno <dueno src gnome org>]

The branch 'wip/dueno/backend' 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:

  64e8c76... secret-retrievable: New interface to represent read-only it
  777b304... secret-item: Implement SecretRetrievableInterface
  7a8d152... secret-password: Add search functions
  facfb0f... secret-password: Add lookup_binary functions
  a3a7af6... secret-password: Add store_binary functions
  1a298ea... tests: Add tests for binary variant of secret_{lookup,store
  85565d2... secret-value: Add secret_value_unref_to_password
  f71f968... secret-password: Mark @schema argument nullable for *v func
  d3ff8a9... secret-tool: Switch to using the simple API
  7d993af... secret-service: Move parent property setting to constructor
  c2f8aaa... secret-backend: New interface to represent password storage
  ae2d181... secret-service: Implement SecretBackendInterface
  5986376... secret-backend: Add a way to uncache singleton instance
  56c2fc8... secret-password: Port to SecretBackend interface

Commits added to the branch:

  52812b9... secret-retrievable: New interface to represent read-only it (*)
  dfac32b... secret-item: Implement SecretRetrievableInterface (*)
  a9591cc... secret-password: Add search functions (*)
  bc4f04f... secret-password: Add lookup_binary functions (*)
  9071f3b... secret-password: Add store_binary functions (*)
  9f083bf... tests: Add tests for binary variant of secret_{lookup,store (*)
  0880251... secret-value: Add secret_value_unref_to_password (*)
  1942098... secret-password: Mark @schema argument nullable for *v func (*)
  4843982... secret-tool: Switch to using the simple API (*)
  eede83a... secret-service: Move parent property setting to constructor
  6ecd966... secret-backend: New interface to represent password storage
  f283cf4... secret-service: Implement SecretBackendInterface
  367a3a8... secret-backend: Add a way to uncache singleton instance
  51a5958... secret-password: Port to SecretBackend interface

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