[feature] Loading client script on demand. (#2567)
[feature] Loading client script on demand. (#2567)

Support for the serving of the client script mess with packagers like
browserify, webpack. Especcialy in projects where it is not used at all.
This patch is workaround to avoid that problem in the cases when client
script is not served.
socketio/socket.io,l3dlp/socket.io,SimenB/socket.io,Automattic/socket.io,mosoft521/socket.io,Nibbler999/socket.io,mosoft521/socket.io,jondubois/socket.io,chapuzzo/socket.io,Automattic/socket.io,l3dlp/socket.io,socketio/socket.io