Asterisk: Initial AMI support

Introduce config and functions around TELNETasp_PT to implement an AMI
interface client to interact with Asterisk.

So far only the "Action: Login" case is implemented.

Change-Id: I2c570e4d04e7ab8c44962cf484e4bbc946209aee
diff --git a/asterisk/regen_makefile.sh b/asterisk/regen_makefile.sh
index 3cd0a66..1aa18ae 100755
--- a/asterisk/regen_makefile.sh
+++ b/asterisk/regen_makefile.sh
@@ -15,6 +15,7 @@
 	TCCConversion.cc
 	TCCInterface.cc
 	TCCOpenSecurity.cc
+	TELNETasp_PT.cc
 "
 
 ../regen-makefile.sh -e $NAME $FILES