japanese/ebnetd: Fix build on real environment
by changing character set of doc-ja/ebnetd-ja.texi from EUC-JP to UTF-8.
- Change pkg-install so it doesn't modify /etc/services while building package
- Bump PORTREVISION by package change
PR: 242091
Submitted by: Yasuhiro KIMURA <yasu@utahime.org> (maintainer)