test/rss/rss-assertions.rb, test/rss/test_atom.rb: use
pack/unpack("m") instead of base64 library.
* lib/webrick/httpproxy.rb: use delete("\n") instead of chomp/chop
because the result of pack("m") might be multi-line.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14303 b2dd03c8-39d4-4d8f-98ff-823fe69b080e