package/linux-tools: fix SysV init script

This commit fixes the S10hyperv SysV init script which expects binaries
to be locate in /sbin while they are installed in /usr/sbin. Please
note, that the systemd init scripts correctly reference them.
Furthermore, the SysV init script did not check for an actual HyperV
environment to be present, which is also corrected. In addition, this
commit also fixes check-package warnings regarding a missing DAEMON
definition.

Signed-off-by: Jens Maus <mail@jens-maus.de>
[Peter: drop from .checkpackageignore]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 14c4bd7bf8150283e158c50df87c77d63bb1b73c)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

.checkpackageignore

@@ -93,7 +93,6 @@ package/libftdi/0002-libftdi.pc-requires-libusb-fix-static-build.patch Sob
 package/libiio/S99iiod Shellcheck Variables
 package/libmad/0001-mips-h-constraint-removal.patch Sob
 package/lighttpd/S50lighttpd EmptyLastLine Indent Shellcheck Variables
-package/linux-tools/S10hyperv Variables
 package/linuxptp/S65ptp4l Indent Shellcheck
 package/linuxptp/S66phc2sys Indent Shellcheck
 package/lirc-tools/S25lircd Indent Variables

package/linux-tools/S10hyperv

@@ -2,14 +2,18 @@
 
 PROGS="@PROGS@"
 PIDDIR="/var/run"
+DAEMON="hyperv"
 
 # shellcheck source=/dev/null
-[ -r "/etc/default/hyperv" ] && . "/etc/default/hyperv"
+[ -r "/etc/default/$DAEMON" ] && . "/etc/default/$DAEMON"
+
+# only continue if we are in a HyperV platform
+[ -e "/sys/bus/vmbus" ] || exit 0
 
 start_one() {
 	printf 'Starting %s: ' "$1"
 	# shellcheck disable=SC2086 # we need the word splitting
-	start-stop-daemon -b -m -S -q -p "$PIDDIR/$1.pid" -x "/sbin/$1" -- -n
+	start-stop-daemon -b -m -S -q -p "$PIDDIR/$1.pid" -x "/usr/sbin/$1" -- -n
 	status=$?
 	if [ "$status" -eq 0 ]; then
 		echo "OK"