Please keep discussion on the mailing list.
>>>> "Eduards" == Eduards Mihelovics
<emikhelo(a)gmail.com> writes: 
    Eduards> M-x set-coding-priority-list command is not available in
    Eduards> my installation ( 21.5.17). Is it available in the newest
    Eduards> beta?
Ah, sorry; it's not an interactive command.
M-: (set-coding-priority-list '(utf-8)) RET
should give you a much better experience, but I can't promise it's
optimal.  Watch out for single-byte encodings such as ISO-8859 and
KOI-8 being incorrectly detected.  If you have trouble, we can try
tuning the list.
To make that default, put the expression in parantheses in your init file.
-- 
School of Systems and Information Engineering 
http://turnbull.sk.tsukuba.ac.jp
University of Tsukuba                    Tennodai 1-1-1 Tsukuba 305-8573 JAPAN
               Ask not how you can "do" free software business;
              ask what your business can "do for" free software.