gitweb: Convert generated contents to utf8 in commitdiff_plain
If the commit message, or commit author contains non-ascii, it must be
converted from Perl internal representation to utf-8, to follow what
got declared in HTTP header. Use to_utf8() to do the conversion.
This necessarily replaces here-doc with "print" statements.
Signed-off-by: Yasushi SHOJI <yashi@atmark-techno.com>
Acked-by: İsmail Dönmez <ismail@pardus.org.tr>
Acked-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>