Added RetrieveAddresses definition

[fearworksmedia]

This is part of a dirty attempt to get a list of IP addresses on the PC and return them (as a string with each IP address on a new line... because I don't know how else to do it), and then be able to specify whichever one of these we choose when creating a listening socket to bind to a specific IP address instead of being at the mercy of whichever one getaddrinfo() finds first. At least I think that's how it works.