Added following snippits about Asterisk

* A Basic Asterisk server for internal calling with IVR, curl triggers and message playback
* A Asterisk server to act as a bridge between a Bluetooth phone (as in/out bound route)
* A Node-Red Subflow to create a call between extensions using ARI

Linux/Config-Examples/Asterisk-basic-server/logger.conf

@@ -0,0 +1,7 @@
+; Asterisk logging configuration
+
+[general]
+
+[logfiles]
+console => notice,warning,error
+messages => notice,warning,error