Update ru_RU.lang

slightly improved syntax
Merge pull request #140 from pvc1/patch-10

Update ru_RU.lang
upgrade: If upgrading from alt. path, don't whine about unlink() problems
rpi: Fix showtime exit problems
upgrade: Only include stable track for those targets that have it
Add support for triggering a sw upgrade check
Check for showtime upgrades daily
rpi: Add CEC logging
fix typo