Rewrite init script for procd support

Signed-off-by: Paul Wassi <p.wassi@gmx.at>

Remove a hotplug script, which starts/stops gpsd with
attaching/detaching a PL2302 USB-UART device.

Signed-off-by: Paul Wassi <p.wassi@gmx.at>

Make the default config look like usual,
i.e.: indentation using tabs, single quotes, booleans 0/1

Signed-off-by: Paul Wassi <p.wassi@gmx.at>

Because this selects ttyUSB0 (bad choice) by default, turn off enabling gps
by default until the user set's the tty manually and will stop gpsd from
stomping on another device's tty.

Signed-off-by: Pushpal Sidhu <psidhu@gateworks.com>

This package is currently in oldpackages. Add here to keep support for gpsd.

From oldpackages, this was bumped from 3.10 -> 3.15 and includes an upstream
patch to allow building with musl.

Signed-off-by: Pushpal Sidhu <psidhu@gateworks.com>