Changing this to:

```ruby
def initialize(options={})
 # ...
end
```

Would allow running this a little more cleanly inside of a `config.ru`, .e.g:

```ruby

require 'rubygems'
require 'rack'
require 'protobuf'
require 'protobuf/rpc/servers/http/server'

require 'my/rpc'

map '/' do
  run Protobuf::Rpc::Http::Server.new
end
```