v0.14.40-rc.1

This is a release candidate for v0.14.40.

Resolved issues:

* #3628: More data is reported as part of the anonymous usage report.
* #4392: Sync errors are better reported.
* #4405: Removing paused folders does not cause a panic.
* #4414: Local IPv4 discovery is more resilient against write failures.
* #4431: Clearer logging around config failures at startup.
* #4432: Do not complain about inability to fsync files.
* #4446: KCP connections are improved.
* #4451: Folder health checking is improved.
* #4453: STUN mappings are more stable.

This release also includes built in support for file system notifications,
although it is disabled by default. To test this functionality, enable the
advanced folder config `fsWatcherEnabled`.

Additionally, the UDP based "KCP" protocol is now enabled by default. This
provides better connectivity through NAT devices. TCP is the preferred
connection protocol when available.
-----BEGIN PGP SIGNATURE-----
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=Auyc
-----END PGP SIGNATURE-----
