#2620 xetex can't input files with BOM anymore

[U_Fischer]

xecyr.sty is a example of utf8-encoded file with a BOM. Using it together with xelatex:

\documentclass{article}
\usepackage{xecyr}

\begin{document}
abc
\end{document}

gives the error

! LaTeX Error: Missing \begin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...

l.1 ´╗┐
       % Modified from Evgenie Medvedev ...

I tested on a current miktex and also with miktex next.

pdflatex and lualatex have no problems with the BOM (they naturally choke over other things later).

[Christian Schenk]

Thank you, I have fixed this.