Update awstats-ru.txt

Update awstats-ru.txt

"message7=Statistics for"
Translation of the "message7=Статистика за" needs to be updated to "message7=Статистика для"
as preposition "for" is related to "hostnames", but not a "period of time", for example
Statistics for awstats.org
Статистика для awstats.org

Capitalization needs to be corrected for consistency/incomplete translation/word pages needs to be translated:
message28=	different pages-url	message28=	Различные url
message28=	different pages-url	message28=	различные страницы-url

Capitalization needs to be corrected for consistency:
107	message103=	different keyphrases	message103=	Различные ключевые фразы
107	message103=	different keyphrases	message103=	различные ключевые фразы

Capitalization needs to be corrected for consistency:
message164=	different worms	message164=	Различные вирусы
message164=	different worms	message164=	различные вирусы

Incorrect translation: Добавить в закладки (предполагаемый) has a meaning "Add to bookmarks (supposed)"

message137=	Successful hits on favicon.ico	message137=	Добавить в закладки (предполагаемый)
message137=	Successful hits on favicon.ico	message137=	Успешные хиты для favicon.ico

New messages translated:
message173= Opera versions message173= Версии Opera
message174= Safari versions message174= Версии Safari
message175= Chrome versions message175= Версии Chrome
message176= Konqueror versions message176= Версии Konqueror
message177= , message177= ,
message178= Downloads message178= Скачивания
message179= TB message179= TБ