dynamic socket settings

[vapier]

currently the various socket settings can only be set once at construction (connect) time. i don't understand why. *NIX platforms allow all of these (send buf size, recv buf size, keep alive, nodelay) to be modified on the fly. Windows does too afaik. is there a platform that doesn't allow this that the API is catering to ?

having this limitation makes it difficult to map existing POSIX code onto the web platform without rewriting/forking things.