sethostname: provide local prototype for gethostname

 *

 * Since some systems think this prototype doesn't match the system provided

 * function, we AVOID including unistd.h or other headers that may include the

 * original prototype!

 * original prototype! We provide our own instead (to avoid warnings).

 */

int gethostname(char *name, size_t namelen);

int gethostname(char *name, size_t namelen)

{

  const char *force_hostname = getenv(GETHOSTNAME_ENV_VAR);