Add modem hangup vulnerability.

This string can cause some modems to disconnect.  Years ago, I triggered
this behavior accidentally when, for an unrelated reason, my email
signature contained the string.  Mail sent to a mailing list caused some
subscribers' modems to disconnect.

Explained here, in the final paragraph under "Hayes' Solution":
https://en.wikipedia.org/wiki/Hayes_command_set

blns.base64.json

@@ -424,6 +424,7 @@
      "Li4vLi4vLi4vLi4vLi4vLi4vLi4vLi4vLi4vLi4vLi4vZXRjL2hvc3RzCg==",
      "KCkgeyAwOyB9OyB0b3VjaCAvdG1wL2JsbnMuc2hlbGxzaG9jazEuZmFpbDsK",
      "KCkgeyBfOyB9ID5fWyQoJCgpKV0geyB0b3VjaCAvdG1wL2JsbnMuc2hlbGxzaG9jazIuZmFpbDsgfQo=",
+     "KysrQVRIMA==",
      "Q09OCg==",
      "UFJOCg==",
      "QVVYCg==",

blns.base64.txt

@@ -563,6 +563,7 @@ Li4vLi4vLi4vLi4vLi4vLi4vLi4vLi4vLi4vLi4vLi4vZXRjL2hvc3RzCg==
 
 KCkgeyAwOyB9OyB0b3VjaCAvdG1wL2JsbnMuc2hlbGxzaG9jazEuZmFpbDsK
 KCkgeyBfOyB9ID5fWyQoJCgpKV0geyB0b3VjaCAvdG1wL2JsbnMuc2hlbGxzaG9jazIuZmFpbDsgfQo=
+KysrQVRIMA==
 
 # MSDOS/Windows Special Filenames
 #

blns.json

@@ -444,6 +444,7 @@
   "../../../../../../../../../../../etc/hosts", 
   "() { 0; }; touch /tmp/blns.shellshock1.fail;", 
   "() { _; } >_[$($())] { touch /tmp/blns.shellshock2.fail; }", 
+  "+++ATH0",
   "CON", 
   "PRN", 
   "AUX", 

blns.txt

@@ -570,6 +570,7 @@ $ENV{'HOME'}
 () { 0; }; touch /tmp/blns.shellshock1.fail;
 () { _; } >_[$($())] { touch /tmp/blns.shellshock2.fail; }
 <<< %s(un='%s') = %u
++++ATH0
 
 #	MSDOS/Windows Special Filenames
 #