The Accept-Encoding
header tells the server what compression algorithms you can handle, for instance, the server might send the response gzipped because you told it that you can handle it.
The character encodings that you can handle are signaled to the server in the Accept-Charset
header. For example Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3
Anyway, if you just want your html files to be encoded in UTF-8, all you need to do is to save those files in UTF-8 encoding. This depends on your text editor.