Dike out Linux senfile, it doesn't work.

Isolated by:	Xing Li <xing@litespeedtech.com>


git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@978 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_response.c

@@ -226,6 +226,7 @@ RES_WriteObj(struct sess *sp)
 			AN(st->stevedore);
 			u += st->len;
 			sp->wrk->acct.bodybytes += st->len;
+#ifdef __FreeBSD__
 #ifdef HAVE_SENDFILE
 			/*
 			 * XXX: the overhead of setting up senddile is not
@@ -241,6 +242,7 @@ RES_WriteObj(struct sess *sp)
 				continue;
 			}
 #endif /* HAVE_SENDFILE */
+#endif /* __FreeBSD__ */
 			VSL_stats->n_objwrite++;
 			WRK_Write(sp->wrk, st->ptr, st->len);
 		}