Version 2.27.90
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- Autostart polkit-gnome authentication agent.
- Add screen capture sound effect to screenshot tool.
- If HOST_NAME_MAX is not available, try _POSIX_HOST_NAME_MAX, then 
  default to 256.
- Add users "nobody4" and "noaccess" to the list of users to filter from
  the Face Browser.
- Add Solaris logindevperm support. 
- Fix mispelling of XDMCP.
- Improve documentation.

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