base-files: add a wrapper for init scripts in profile

"service" is a simple wrapper that will allow to call init.d scripts

current method:     #  /etc/init.d/network reload
with the wrapper:   #  service network reload

If the wrapper is called without arguments or with a wrong init script name, it will print an error and list the content of /etc/init.d/ folder

Signed-off-by: Alberto Bursi <alberto.bursi@outlook.it>

package/base-files/files/etc/profile

@@ -41,3 +41,12 @@ in order to prevent unauthorized SSH logins.
 --------------------------------------------------
 EOF
 fi
+
+service() {
+	[ -f "/etc/init.d/$1" ] || {
+		echo -n "$1 does not exist. the following services are available :"
+		ls "/etc/init.d"
+		return 1
+	}
+	/etc/init.d/$@
+}