Fix issues discovered in pre-releases/beta

Closed/Fixed

Wrong permissions set for music/playlist folders

(Fixed in 0.8.2) Audio mixer is mute by default on certain drivers (probably only USB2.0?)
(Fixed in 0.8.2 - Click on "Set volume to 100%") MPD-dsd-rt has problem with audio device output field
(Fixed in 0.8.2) Add support for Qualcomm® Atheros® AR8171 network adapter
(Fixed in ISO build of 0.8.2) The text "Client: Disabled" is confusing. Change it to "Not Applicable"?
(Fixed in 0.8.3) LMS has a manual configuration icon to it. Shouldn't be there.
(Fixed in 0.8.3) Snakeoil page - Adding a new priority entry when there are already existing entries will blank everything out.
(Fixed in 0.8.3) Priority settings don't work
(Fixed in 0.8.3) Disable console login not working
(Fixed in 0.8.3) Selecting MPD also started squeezelite. It shouldn't!
(Fixed in 0.8.3) Activation OK message should not be in red/error
(Fixed in 0.8.3) Add Squeezelite-R2
(Fixed in 0.8.4) Reboot and firmware upgrade dialog boxes need to be improved
(Fixed in 0.8.4) Saving network settings returns an error code, but settings still saved.
(Fixed in 0.8.5) Fixed crash when updating firmware
(Fixed in 0.8.5. People with issues please go here for fix) Added pc-grub to x86_64 ISO
(Fixed in 0.8.5 ISO) Delay process priorities change after computer boot
(Fixed in 0.8.6) Finish the Chinese translations!!!
(Fixed in 0.8.7) If LMS is running, restart snakeoil-rest might not work (meaning theme is not extracted when starting up, or switching themes)
(Fixed in 0.9.0) DNS server not saved when networking set to static.
(Fixed in 0.9.0) alsamixer volume saved on unmute, and restored on boot
(Fixed in 0.9.0) Fixed a GUI race condition when updating firmware/module/deb
(Fixed in 0.9.0) Not all CPUs have L3 cache. For these processors, say "NONE" in the dashboard for relevant entries
(Fixed in 0.9.0)