Remove my dire-warning `FIXME' in IPv4 dotted-decimal handling

because Jeroen points out that it's perfectly OK the way it is :-)

[originally from svn r1080]

winnet.c

@@ -288,8 +288,8 @@ SockAddr sk_namelookup(char *host, char **canonicalname)
     else
     {
 	/*
-         * Hack inserted to deal with problems with numeric IPs.
-         * FIXME: how will this work in IPv6?
+	 * This must be a numeric IPv4 address because it caused a
+	 * success return from inet_addr.
 	 */
         ret->family = AF_INET;
 	*canonicalname = host;