Minor Snowflake code quality improvements
More minor changes I made while working on integrating turbo tunnel code.
- initialize a global variable only once
- apply naming conventions to the
websocketconn
package - make
websocketconn.New
return a pointer, to directly satisfy theio.ReadWriteCloser
interface without needing&
- allow more than one simultaneous SOCKS request in the client (tor never uses more than one, but it's how the example code and all other pluggable transport clients work)