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Newsgroups: comp.lang.ada
Date: Tue, 30 Oct 2018 19:57:15 -0700 (PDT)
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Subject: windows-1251 to utf-8
From: eduardsapotski@gmail.com
Injection-Date: Wed, 31 Oct 2018 02:57:16 +0000
Content-Type: text/plain; charset="UTF-8"
Xref: reader02.eternal-september.org comp.lang.ada:54726
Date: 2018-10-30T19:57:15-07:00
List-Id: <comp.lang.ada>

I get HTML from web-server in windows-1251 encoding. 
How do convert HTML in windows-1251 to utf-8?
Thank.