test ipv6

Makefile use install(1) to install executable and man page

code doesn't check return values for getting time

(05/Jul/2002)
Reports success with GNU /lib/libc.so.6 -> libc-2.1.3.so
 $ gethost-0.03/gethost -x kjfsdhkjfhdf
 Invalid address: "kjfsdhkjfhdf" : Success
