procd: replace backticks by $(...)

This replaces deprecated backticks by more versatile $(...) syntax.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

package/system/procd/files/procd.sh

@@ -528,10 +528,10 @@ uci_validate_section()
 	local _result
 	local _error
 	shift; shift; shift
-	_result=`/sbin/validate_data "$_package" "$_type" "$_name" "$@" 2> /dev/null`
+	_result=$(/sbin/validate_data "$_package" "$_type" "$_name" "$@" 2> /dev/null)
 	_error=$?
 	eval "$_result"
-	[ "$_error" = "0" ] || `/sbin/validate_data "$_package" "$_type" "$_name" "$@" 1> /dev/null`
+	[ "$_error" = "0" ] || $(/sbin/validate_data "$_package" "$_type" "$_name" "$@" 1> /dev/null)
 	return $_error
 }
 

package/system/procd/files/reload_config

@@ -7,7 +7,7 @@ for config in /etc/config/*; do
 done
 MD5FILE=/var/run/config.md5
 [ -f $MD5FILE ] && {
-	for c in `md5sum -c $MD5FILE 2>/dev/null| grep FAILED | cut -d: -f1`; do
+	for c in $(md5sum -c $MD5FILE 2>/dev/null| grep FAILED | cut -d: -f1); do
 		ubus call service event "{ \"type\": \"config.change\", \"data\": { \"package\": \"$(basename $c)\" }}"
 	done
 }