Refine clean up procedure

mobile/src/main/java/be/mygod/vpnhotspot/SettingsFragment.kt

@@ -31,7 +31,7 @@ class SettingsFragment : PreferenceFragmentCompatDividers(), ServiceConnection {
                     "while iptables -D FORWARD -j vpnhotspot_fwd; do done",
                     "iptables -F vpnhotspot_fwd",
                     "iptables -X vpnhotspot_fwd",
-                    "ip rule del lookup 62",
+                    "while ip rule del lookup 62; do done",
                     "ip route flush table 62")
             true
         }

mobile/src/main/java/be/mygod/vpnhotspot/Utils.kt

@@ -26,7 +26,7 @@ const val NOISYSU_TAG = "NoisySU"
 const val NOISYSU_SUFFIX = "SUCCESS\n"
 fun noisySu(vararg commands: String): Boolean {
     val process = ProcessBuilder("su", "-c", """function noisy() { "$@" || echo "$@" exited with $?; }
-${commands.joinToString("\n") { "noisy $it" }}
+${commands.joinToString("\n") { if (it.startsWith("while ")) it else "noisy $it" }}
 echo $NOISYSU_SUFFIX""")
             .redirectErrorStream(true)
             .start()