Small fixes of russian translation
Small fixes of russian translation

- Removed "extension" in "расширение PostGIS extension"
- Removed space before dot
- Changed 'on' meaning from on/off to 'on irc.freenode.net' - "на"

maposmatic/maposmatic,hholzgra/maposmatic,hholzgra/maposmatic,hholzgra/maposmatic,maposmatic/maposmatic,maposmatic/maposmatic,hholzgra/maposmatic,hholzgra/maposmatic,maposmatic/maposmatic