Fixes: e0d7181a6Closes: #22973Closes: #22988
1. Make the new `startup()` function in `/usr/bin/wifi_schedule.sh`
respect the global `enabled` config flag; in particular, make no
changes to `/etc/config/wireless` when wifi_schedule is disabled.
2. Make the new `/etc/init.d/wifi_schedule` service script executable.
Signed-off-by: Rani Hod <rani.hod@gmail.com>