Plug fd leaks

usr.sbin/acpi/acpidb/acpidb.c

@@ -370,6 +370,7 @@ load_dsdt(const char *dsdtfile)
 	}
 	if (fstat(fd, &sb) == -1) {
 		perror("fstat");
+		close(fd);
 		return (-1);
 	}
 	code = mmap(NULL, (size_t)sb.st_size, PROT_READ, MAP_PRIVATE, fd, (off_t)0);

usr.sbin/bluetooth/bt3cfw/bt3cfw.c

@@ -221,6 +221,7 @@ main(int argc, char *argv[])
 
 	free(firmware);
 	firmware = NULL;
+	fclose(firmware_file);
 
 	return (0);
 }

usr.sbin/boot0cfg/boot0cfg.c

@@ -330,10 +330,12 @@ read_mbr(const char *disk, u_int8_t **mbr, int check_version)
 	    err(1, "%s", disk);
 	if (n != mbr_size)
 	    errx(1, "%s: short read", disk);
+	close(fd);
 	return (mbr_size);
     }
     *mbr = malloc(sizeof(buf));
     memcpy(*mbr, buf, sizeof(buf));
+    close(fd);
 
     return sizeof(buf);
 }