Add Sockets.recvfrom2 to return both host and port

stdlib/Sockets/src/Sockets.jl

@@ -331,6 +331,17 @@ Read a UDP packet from the specified socket, returning a tuple of `(address, dat
 `address` will be either IPv4 or IPv6 as appropriate.
 """
 function recvfrom(sock::UDPSocket)
+    from, data = recvfrom2(sock)
+    return (from.host, data)
+end
+
+"""
+    recvfrom2(socket::UDPSocket) -> (host_port, data)
+
+Read a UDP packet from the specified socket, returning a tuple of `(host_port, data)`, where
+`host_port` will be an InetAddr{IPv4} or InetAddr{IPv6}, as appropriate.
+"""
+function recvfrom2(sock::UDPSocket)
     iolock_begin()
     # If the socket has not been bound, it will be bound implicitly to ::0 and a random port
     if sock.status != StatusInit && sock.status != StatusOpen && sock.status != StatusActive
@@ -348,7 +359,7 @@ function recvfrom(sock::UDPSocket)
         From = Union{InetAddr{IPv4}, InetAddr{IPv6}}
         Data = Vector{UInt8}
         from, data = wait(sock.recvnotify)::Tuple{From, Data}
-        return (from.host, data)
+        return (from, data)
     finally
         unlock(sock.recvnotify)
     end