Use command -v $foo instead of [ -x /sbin/$foo ] in maintainer script

debian/changelog

 tor (0.2.9.4-alpha-1.1) experimental; urgency=medium
 
   * Raise Standards-Version to 3.9.8 - no changes needed.
+  * Use command -v $foo instead of [ -x /sbin/$foo ] in maintainer script.
 
- -- Peter Palfrader <weasel@debian.org>  Tue, 08 Nov 2016 13:27:58 +0100
+ -- Peter Palfrader <weasel@debian.org>  Tue, 08 Nov 2016 13:30:40 +0100
 
 tor (0.2.9.4-alpha-1) experimental; urgency=medium
 

debian/tor.postinst

@@ -121,7 +121,7 @@ if [ "$1" = "configure" ] &&
 	checksum="`md5sum /etc/apparmor.d/usr.sbin.tor | awk '{print $1}'`"
 	pkg_md5="`dpkg-query -W -f='${Conffiles}' tor | awk '$1=="/etc/apparmor.d/usr.sbin.tor" {print $2}'`"
 	if [ "$checksum" = "$pkg_md5" ]; then
-		if [ -x /sbin/apparmor_parser ] ; then
+		if command -v apparmor_parser > /dev/null 2>&1 ; then
 			apparmor_parser --remove -T -W /etc/apparmor.d/usr.sbin.tor || true
 		fi