This fixes vulnerability GO-2022-0969 reported by govulncheck:
HTTP/2 server connections can hang forever waiting for a clean
shutdown that was preempted by a fatal error. This condition can
be exploited by a malicious client to cause a denial of service.
Call stacks in your code:
Error: cmd/serve/restic/restic.go:150:22: github.com/rclone/rclone/cmd/serve/restic.init$1$1 calls golang.org/x/net/http2.Server.ServeConn
Found in: golang.org/x/net/http2@v0.0.0-20220805013720-a33c5aa5df48
Fixed in: golang.org/x/net/http2@v0.0.0-20220906165146-f3363e06e74c
More info: https://pkg.go.dev/vuln/GO-2022-0969
Before this change if --user-server-modtime was in use the ModTime
could change for an object as we receive it accurate to the nearest ms
in listings, but only accurate to the nearest second in HEAD and GET
requests.
Normally AWS returns the milliseconds as .000 in listings, but if
versions are in use it may not. Storj S3 also seems to return
milliseconds.
This patch tries to keep the maximum precision in the last modified
time, so it doesn't update a last modified time with a truncated
version if the times were the same to the nearest second.
See: https://forum.rclone.org/t/cache-fingerprint-miss-behavior-leading-to-false-positive-stalen-cache/33404/
Before this change rclone used statx() to read the metadata for files
from the local filesystem when `-M` was in use.
Unfortunately statx() was only introduced in kernel 4.11 which was
released in April 2017 so there are current systems (eg Centos 7)
still on kernel versions which don't support statx().
This patch checks to see if statx() is available and if it isn't, it
falls back to using fstatat() which was introduced in Linux 2.6.16
which is guaranteed for all Go versions.
See: https://forum.rclone.org/t/metadata-from-linux-local-s3-failed-to-copy-failed-to-read-metadata-from-source-object-function-not-implemented/33233/
The current default AnnounceInterval is too short, causing the
multicast domain to be flooded with NOTIFY announcements,
which may prevent other dlna devices from sleeping.
This change allows users to set the announcement interval,
and it's default value also increased to 12 minutes.
Even within the interval, rclone can still passively respond to
M-SEARCH requests from other devices.
Verify the http service listening address and the SSDP server
announcement address to prevent accidental listening of IPv6 addresses
that do not support dlna yet and may be globally accessible.
Unlistened addresses on the interface will also be filtered out of the
SSDP announcement to avoid misleading other services in the multicast domain.
Before this change, if the a mount was created via the rc but unmounted
externally with `fusermount -u` say, rclone would still believe the mount
was active when it wasn't.
According to [systemd.automount](https://www.freedesktop.org/software/systemd/man/systemd.automount.html) manual
> Note that automount units are separate from the mount itself, so you should
> not set After= or Requires= for mount dependencies here.
> For example, you should not set After=network-online.target or
> similar on network filesystems. Doing so may result in an ordering cycle.
