eventmachine/eventmachine — pull request #348 by gregolsen (2012-07-31 18:27:25+00:00)
Title: String#[] returns a character not a character code since 1.9

I've faced a bug when a dot at the beginning of the line was duplicated.
That was caused by this line in `SmtpServer#process_data_line`:
ln.slice!(0...1) if ln[0] == 46
In 1.8 `String#[]` indeed returns a character code, but for 1.9 it simply returns a character (`String#getbyte` can be used instead)