Major Toolkit Update: socat and TTYd

-Both SMD11 and SMD7 are now used to create 2 separate AT command flows/streams
   -SMD11 is linked to ttyOUT
   -SMD7 is linked to ttyOUT2
-ttyOUT is intended for use with automated AT commands like the modem status parse script
-ttyOUT2 is intended for user initiated AT commands like the AT Commands page in simpleadmin or the new atcmd shell command

-Entware installation has been improved for better compatibility and smoother install.

-Added the option to try out TTYd
   -This is a web based shell console you can access via http on port 443
   -More improvements to come

socat-at-bridge/systemd_units/socat-killsmd7bridge.service

@@ -0,0 +1,9 @@
+[Unit]
+Description=Kill port_bridge process on boot
+
+[Service]
+Type=oneshot
+ExecStart=/usrdata/socat-at-bridge/killsmd7bridge
+
+[Install]
+WantedBy=multi-user.target

socat-at-bridge/systemd_units/socat-smd7-from-ttyIN2.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Read from /dev/ttyIN2 and write to smd7
+BindsTo=socat-smd7.service
+After=socat-smd7.service
+
+[Service]
+ExecStart=/bin/bash -c "/bin/cat /dev/ttyIN2 > /dev/smd7"
+ExecStartPost=/bin/sleep 2s
+StandardInput=tty-force
+Restart=always
+RestartSec=1s
+
+[Install]
+WantedBy=multi-user.target

socat-at-bridge/systemd_units/socat-smd7-to-ttyIN2.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Read from /dev/smd7 and write to ttyIN2
+BindsTo=socat-smd7.service
+After=socat-smd7.service
+
+[Service]
+ExecStart=/bin/bash -c "/bin/cat /dev/smd7 > /dev/ttyIN2"
+ExecStartPost=/bin/sleep 2s
+StandardInput=tty-force
+Restart=always
+RestartSec=1s
+
+[Install]
+WantedBy=multi-user.target

socat-at-bridge/systemd_units/socat-smd7.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Socat Serial Emulation for smd7
+After=ql-netd.service
+
+[Service]
+ExecStart=/usrdata/socat-at-bridge/socat-armel-static -d -d pty,link=/dev/ttyIN2,raw,echo=0 pty,link=/dev/ttyOUT2,raw,echo=1
+# Add a delay to prevent the clients from starting too early
+ExecStartPost=/bin/sleep 2s
+Restart=always
+RestartSec=1s
+
+[Install]
+WantedBy=multi-user.target