sendfile01: rename SF_Server to sendfile01_server and add it into Makefile

1) Rename SF_Server to sendfile01_server to avoid collisions
2) The test always fails because SF_Server is not installed, add
   sendfile01_server into sendfile01 makefile to install it.

Signed-off-by: Simon Xu <xu.simon@oracle.com>
xinetd_tests.sh: remove RECORD and eliminate "|| RC=$?"

1) In xinetd.conf, `RECORD' is not a valid value for entry `log_on_failure'
   (I couldn't find a distro in which it's valid), and it makes xinetd
   successfully starts and promptly exit with error message:

   "Bad log_on_failure flag: RECORD [file=/etc/xinetd.conf] [line=6]",

   but the test will pass because telnet service is not started and that's
   what it expect.

2) Eliminate '|| RC=$?' because because it may not be excecuted and the
   original value in RC can mess things up.  Also remove the RC=0
   initializations that are now unnecessary.

Signed-off-by: Simon Xu <xu.simon@oracle.com>