…upgrade checking

…hemactep#168)

Summary:
Unlike motors and ircut, the irled script lacks a status reporting
option. This patch implements a read option.

Although the underlying gpio script has a read function, this
patch bypasses that abstraction to read the sys tree directly.
This is a measured and intentional tradeoff. Output from the
gpio script is decorated with unwanted formatting codes and
superfluous data fields, which can't be disabled. As the
intended application for this output is another program, clean
and simple output is preferred.

This will be plumbed through to a web api in a future patch,
pending reflection on the most natural way to mesh that feature
with the existing APIs.

The targeted application is an unpublished Android mobile
application for viewing and controlling thingino pan-tilt
cameras on a local network, which will be open-sourced when
ready.

A future submission may implement a clean output mode for the
gpio script, and modify this call site to use that abstraction
layer.

Testing:
This was tested from the ssh command line on a Cinnado D1 and
a WUUK Y0510. In addition to verifying the correct readings,
the state changes of the IR led were also verified by
inspection.

```
test # irled on
test # irled read
1
test # irled off
test # irled read
0
test # irled read ir850
0
test # irled on ir850
test # irled read ir850
1
test #
```

…atching.

use a temporary file to avoid a conflict with /tmp/motion directory

* udhcpc [option 42] configuration for ntp

* DHCP option 42 creates ntp.conf at /tmp/ntp.conf

* Update S49ntpd

* Replace /etc/ntp.conf with a symlink to /tmp/ntp.conf

* Correcting paths for factory reset/defaults

* Use default ntp.conf from rom

* On reset, ntp.conf should be created under /tmp

* formatting cleanup

* Update S49ntpd

* Update default.script

* Create ntp.conf in init script

* Adjust output

* What if we...

* Use default ntp file

* Reverting ntp change in init.  This is now in S49ntpd

* Reset get NTP default from /etc/default/ntp.conf

* Manual changes mark ntp.conf as readonly. Reset forces a copy to overwrite

* User config should modify and protect /tmp/ntp.conf

* Cleanup

* Added comment to ntp.conf for DHCP added entries

* Reset NTP settings using file from rom

---------

Co-authored-by: Paul Philippov <themactep@gmail.com>

Summary:
The motor.cgi script accepts an "x" url parameter to command
motion. The underlying motors command does not support an
x argument, and this parameter has no effect because it hits
an error in the cgi script:

```
testcam # motors -d x -x 0 -y 0
Invalid Direction Argument x
Usage : motors -d
	 s (Stop)
	 c (Cruise)
	 b (Go to home position)
	 h (Set position X and Y)
	 g (Steps X and Y)
testcam #
```

The motors command supports an h argument, for commanding
movement to absolute coordinates:
```
testcam # motors -d h -x 0 -y 0
testcam #
```

This patch replaces the invalid x parameter with a working h
parameter, and plumbs the command through to the motors binary.

Testing:
The motors.cgi file was patched locally on a Cinnado D1
camera via the overlay filesystem. The following URLs
successfully pan and tilt the camera to absolute positions:
`http://testcam/x/j/motor.cgi?d=h&x=0&y=0`
`http://testcam/x/j/motor.cgi?d=h&x=3000&y=900`

…n/motion (themactep#171)

Summary:
Add a new value option to the gpio script for retrieving
the bare value of a gpio. Use that feature, rather than the
/sys/class/gpio tree, to read values in the irled script.

Subsequent testing revealed that the gpio directory for the
IR LED pin is not available upon boot. The gpio script
provides the logic to export the gpio directory. Using the
gpio script abstraction allows for reading the gpio
without further concern for initialization state.

Testing:

With the patch, after a reboot, testing irled read:
```
test # irled read
0
test # irled on
test # irled read
1
test #
```

After another reboot, testing gpio value option:
```
test # ls /sys/class/gpio/
export      gpio57      gpio58      gpio8       gpiochip0   gpiochip32  gpiochip64  unexport
test # gpio value 9
0
test #
```

Without the patch, after a reboot, showing prior problem:
```
test # irled read
cat: can't open '/sys/class/gpio/gpio9/value': No such file or directory
test # irled on
test # irled read
1
test #
```