Edit Install/Uninstall scripts; Update README.md

Edited Install and Uninstall scripts to handle both at_telnet_daemon and simpleadmin

simpleadmin/ttl/ttl-override

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+#! /bin/bash
+
+# Adapted from https://github.com/natecarlson/quectel-rgmii-configuration-notes/blob/main/files/ttl-override
+# Uses ttlvalue file to read what ttl should be set to
+
+
+if [ -f /usrdata/simpleadmin/ttl/ttlvalue ];
+then
+	ttlfile=$(</usrdata/simpleadmin/ttl/ttlvalue)
+    TTLVALUE=$(echo $ttlfile | grep -o "[0-9]\{1,3\}")
+    
+    if [ -z "${TTLVALUE}" ]; then
+        echo "Couldnt get proper ttl value from file" >&2
+        exit 1
+    fi
+else
+    # Couldnt find ttlvalue file, lets generate one with 0 ttlvalue (0 = disabled)
+    touch /usrdata/simpleadmin/ttl/ttlvalue && echo '0' > /usrdata/simpleadmin/ttl/ttlvalue
+    exit 1
+fi
+
+case "$1" in
+start)
+    if (( $TTLVALUE > 0 )); then
+        echo "Adding TTL override rules: "
+        iptables -t mangle -I POSTROUTING -o rmnet+ -j TTL --ttl-set ${TTLVALUE}
+        ip6tables -t mangle -I POSTROUTING -o rmnet+ -j HL --hl-set ${TTLVALUE}
+    else
+        echo "TTLVALUE set to 0, nothing to do..."
+    fi
+    echo "done"
+    ;;
+  stop)
+    if (( $TTLVALUE > 0 )); then
+        echo "Removing TTL override rules: "
+        iptables -t mangle -D POSTROUTING -o rmnet+ -j TTL --ttl-set ${TTLVALUE} &>/dev/null || true
+        ip6tables -t mangle -D POSTROUTING -o rmnet+ -j HL --hl-set ${TTLVALUE} &>/dev/null || true
+    else   
+        echo "TTLVALUE set to 0, nothing to do..."
+    fi
+    echo "done"
+    ;;
+  restart)
+    $0 stop
+    $0 start
+    ;;
+  *)
+    echo "Usage ttl-override { start | stop | restart }" >&2
+    exit 1
+    ;;
+esac
+
+exit 0

simpleadmin/ttl/ttlvalue

@@ -0,0 +1 @@
+0