utf8-cmdline-prototype: UTF-8 support along Subversion command line tools.

Program Name	Status
svnadmin	UTF8-ized
svnbench	UTF8-ized
svndumpfilter	UTF8-ized
svnfsfs	UTF8-ized
svnlook	UTF8-ized
svnmucc	UTF8-ized
svnrdump	UTF8-ized
svnserve	UTF8-ized
svnsync	UTF8-ized
svnversion	UTF8-ized
svn	UTF8-ized
svn-mergeinfo-normalizer	UTF8-ized
svnconflict	UTF8-ized
svnraisetreeconflict	UTF8-ized
svn-wc-db-tester	UTF8-ized
svnauthz	UTF8-ized