* main:
  lib/model: Use a single lock (phase two: cleanup) (syncthing#9276)
  build(deps): bump actions/setup-go from 4 to 5 (syncthing#9279)
  lib/model: Use a single lock (syncthing#9275)
  cmd/syncthing: Better cli stdin handling (ref syncthing#9166) (syncthing#9281)
  cmd/syncthing: Mostly replace urfave/cli command line parser with alecthomas/kong (syncthing#9166)
  lib/nat: Fix test build failure (ref syncthing#9010)
  lib/model: Add pmut locking for DeviceStatistics (fixes syncthing#9274)
  lib/model: Add pmut locking for DeviceStatistics (fixes syncthing#9274)
  lib/model: Remove spurious "replacing service" failure event (ref syncthing#9271)
  lib/model: Remove spurious "replacing service" failure event (ref syncthing#9271)
  lib/nat, lib/upnp: IPv6 UPnP support (syncthing#9010)
  gui, man, authors: Update docs, translations, and contributors
  gui: Show folder/device status on small screens (syncthing#8643)
  lib/model: Remove runner during folder cleanup (fixes syncthing#9269) (syncthing#9271)

* main: (24 commits)
  lib/ignore: Refactor out result type (syncthing#9343)
  build: Testing infra images for infra-* branches
  lib/versioner: Expand tildes in version directory (fixes syncthing#9241) (syncthing#9327)
  lib/scanner: Prevent sync-conflict for receive-only local modifications  (syncthing#9323)
  gui, man, authors: Update docs, translations, and contributors
  Fix website security link in README.md (syncthing#9325)
  cmd/syncthing: Add CLI completion functionality (fixes syncthing#8616) (syncthing#9226)
  lib/api: Save session & CSRF tokens to database, add option to stay logged in (fixes syncthing#9151) (syncthing#9284)
  Update dependencies (syncthing#9321)
  gui: Always inform about loading data in Restore Versions modal (syncthing#9317)
  lib/build: Allow semver build in version regex (fixes syncthing#9267) (syncthing#9316)
  gui: Keep short deviceID length consistent + xrefs (fixes syncthing#9313) (syncthing#9314)
  build(deps): bump actions/download-artifact from 3 to 4 (syncthing#9294)
  build(deps): bump actions/upload-artifact from 3 to 4 (syncthing#9293)
  gui, man, authors: Update docs, translations, and contributors
  gui, lib/scanner: Improve scan progress indication (ref syncthing#8331) (syncthing#9308)
  lib/protocol: handle empty names in unixOwnershipEqual (fixes syncthing#9039) (syncthing#9306)
  gui, man, authors: Update docs, translations, and contributors
  etc/linux-desktop: use double dash for long options (syncthing#9301)
  lib/connections: Skip allocation in check for missing port (syncthing#9297)
  ...