tcpwrapper: Eliminated shadowed declaration warnings

tcpwrapper: Eliminated shadowed declaration warnings

Clean up: the use of identifiers called "access" and "daemon" shadow
function declarations in unistd.h.  Seen with "-Wextra -pedantic".

tcpwrapper.c: In function haccess_add:
tcpwrapper.c:112: warning: declaration of access shadows a global
declaration /usr/include/unistd.h:288: warning: shadowed declaration is here
tcpwrapper.c: In function good_client:
tcpwrapper.c:161: warning: declaration of daemon shadows a global declaration
/usr/include/unistd.h:953: warning: shadowed declaration is here
tcpwrapper.c: In function check_default:
tcpwrapper.c:212: warning: declaration of daemon shadows a
global declaration
/usr/include/unistd.h:953: warning: shadowed declaration is here

good_client() is used only in support/misc/tcpwrapper.c, so make it
static (and update its prototype to c99 standard form).

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>