S9 EXT  (sys:inet-getpeername integer)  ==>  list

Find out the peer name (IP address and port) of the remote host
connected through the socket described by the file descriptor
INTEGER (this descriptor is typically returned by SYS:INET-ACCEPT).
Return a list of the form

        (ip-address port)

where IP-ADDRESS is a string and PORT is an integer. When no
peer name could be associated with INTEGER, return #F.
