use immutable type for watched sockets
use immutable type for watched sockets

PrFalken/exaproxy,jbfavre/exaproxy,PrFalken/exaproxy,jbfavre/exaproxy,PrFalken/exaproxy,david-farrar/exaproxy,david-farrar/exaproxy,david-farrar/exaproxy