UriDmk patch cleanup

* Fixed text in man page.

* Removed unused include statements.

* Fixed wrong ordering in initialization lists.

* Fixed compiler warnings.

* Fixed bad handling of return value from ioctl.

* Using "sizeof" to match buffer size to read/write.

* Renamed function that started with a capital letter.
Add HIDRAW variables to default config files
Merge branch 'dl1hrc-UriDmk' of https://github.com/sm0svx/svxlink into UriDmk

Conflicts:
	src/svxlink/trx/SquelchHidraw.h