added print channel

config-exemple.json

@@ -6,6 +6,7 @@
     "statsChannel": "channel where the bot send his stats",
     "supportServer":    "Invite to the support server of the bot",
     "feedbackChannel": "id of the channel where the feedback goes",
+    "printChannel": "Channel of where it will send the id of people who asked for print",
     "fbuser": "Facebook email",
     "fbpasswd": "Facebook passwd"
 }