Prepare changelog for 0.9.3

changelog/0.9.3_2018-10-13/issue-1766

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+Enhancement: restore: suppress lchown errors when not running as root
+
+Like "cp" and "rsync" do, restic now only reports errors for changing
+the ownership of files during restore if it is run as root, on non-Windows
+operating systems. On Windows, the error is reported as usual.
+
+https://github.com/restic/restic/issues/1766

changelog/0.9.3_2018-10-13/issue-1909

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+Enhancement: Reject files/dirs by name first
+
+The current scanner/archiver code had an architectural limitation: it always
+ran the `lstat()` system call on all files and directories before a decision to
+include/exclude the file/dir was made. This lead to a lot of unnecessary system
+calls for items that could have been rejected by their name or path only.
+
+We've changed the archiver/scanner implementation so that it now first rejects
+by name/path, and only runs the system call on the remaining items. This
+reduces the number of `lstat()` system calls a lot (depending on the exclude
+settings).
+
+https://github.com/restic/restic/issues/1909
+https://github.com/restic/restic/pull/1912

changelog/0.9.3_2018-10-13/issue-1935

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+Bugfix: Remove truncated files from cache
+
+When a file in the local cache is truncated, and restic tries to access data
+beyond the end of the (cached) file, it used to return an error "EOF". This is
+now fixed, such truncated files are removed and the data is fetched directly
+from the backend.
+
+https://github.com/restic/restic/issues/1935

changelog/0.9.3_2018-10-13/issue-1941

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+Enhancement: Add directory filter to ls command
+
+The ls command can now be filtered by directories, so that only files in the
+given directories will be shown. If the --recursive flag is specified, then
+ls will traverse subfolders and list their files as well.
+
+It used to be possible to specify multiple snapshots, but that has been
+replaced by only one snapshot and the possibility of specifying multiple
+directories.
+
+Specifying directories constrains the walk, which can significantly speed up
+the listing.
+
+https://github.com/restic/restic/issues/1940
+https://github.com/restic/restic/pull/1941

changelog/0.9.3_2018-10-13/issue-1967

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+Enhancement: Use `--host` everywhere
+
+We now use the flag `--host` for all commands which need a host name, using
+`--hostname` (e.g. for `restic backup`) still works, but will print a
+deprecation warning. Also, add the short option `-H` where possible.
+
+https://github.com/restic/restic/issues/1967

changelog/0.9.3_2018-10-13/issue-1978

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+Bugfix: Do not return an error when the scanner is faster than backup
+
+When restic makes a backup, there's a background task called "scanner" which
+collects information on how many files and directories are to be saved, in
+order to display progress information to the user. When the backup finishes
+faster than the scanner, it is aborted because the result is not needed any
+more. This logic contained a bug, where quitting the scanner process was
+treated as an error, and caused restic to print an unhelpful error message
+("context canceled").
+
+https://github.com/restic/restic/issues/1978
+https://github.com/restic/restic/pull/1991

changelog/0.9.3_2018-10-13/issue-2028

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+Enhancement: Display size of cache directories
+
+The `cache` command now by default shows the size of the individual cache
+directories. It can be disabled with `--no-size`.
+
+https://github.com/restic/restic/issues/2028
+https://github.com/restic/restic/pull/2033

changelog/0.9.3_2018-10-13/pull-1780

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+Enhancement: Improve the `find` command
+
+We've updated the `find` command to support multiple patterns.
+
+`restic find` is now able to list the snapshots containing a specific tree
+or blob, or even the snapshots that contain blobs belonging to a given pack.
+A list of IDs can be given, as long as they all have the same type.
+
+The command `find` can also display the pack IDs the blobs belong to, if
+the `--show-pack-id` flag is provided.
+
+https://github.com/restic/restic/issues/1777
+https://github.com/restic/restic/pull/1780

changelog/0.9.3_2018-10-13/pull-1876

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+Enhancement: Display reason why forget keeps snapshots
+
+We've added a column to the list of snapshots `forget` keeps which details the
+reasons to keep a particuliar snapshot. This makes debugging policies for
+forget much easier. Please remember to always try things out with `--dry-run`!
+
+https://github.com/restic/restic/pull/1876

changelog/0.9.3_2018-10-13/pull-1891

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+Enhancement: Accept glob in paths loaded via --files-from
+
+Before that, behaviour was different if paths were appended to command line or
+from a file, because wild card characters were expanded by shell if appended to
+command line, but not expanded if loaded from file.
+
+https://github.com/restic/restic/issues/1891

changelog/0.9.3_2018-10-13/pull-1920

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+Enhancement: Vendor dependencies with Go 1.11 Modules
+
+Until now, we've used `dep` for managing dependencies, we've now switch to
+using Go modules. For users this does not change much, only if you want to
+compile restic without downloading anything with Go 1.11, then you need to run:
+`go build -mod=vendor build.go`
+
+https://github.com/restic/restic/pull/1920

changelog/0.9.3_2018-10-13/pull-1949

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+Enhancement: Add new command `self-update`
+
+We have added a new command called `self-update` which downloads the
+latest released version of restic from GitHub and replaces the current
+binary with it. It does not rely on any external program (so it'll work
+everywhere), but still verifies the GPG signature using the embedded GPG
+public key.
+
+By default, the `self-update` command is hidden behind the `selfupdate`
+built tag, which is only set when restic is built using `build.go` (including
+official releases). The reason for this is that downstream distributions will
+then not include the command by default, so users are encouraged to use the
+platform-specific distribution mechanism.
+
+https://github.com/restic/restic/pull/1949

changelog/0.9.3_2018-10-13/pull-1953

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+Enhancement: ls: Add JSON output support for restic ls cmd
+
+We've implemented listing files in the repository with JSON as output, just
+pass `--json` as an option to `restic ls`. This makes the output of the command
+machine readable.
+
+https://github.com/restic/restic/pull/1953