Update lsl/OpenCollar - listener.lsl

added notify/message handler for auth's requests
removed autoprefix fetch in init, sending request for settings values (in case of individual script reset, this will retrieve the custom setting)
re-enabled & patched up LM_SETTING_EMPTY to set prefix to AutoPrefix in the event no custom value exists.
Cleaned up Prefix-setter in LM_SETTING_RESPONSE (bitwise & in case someone leaves it blank in chat command attempt)
Changed the integer variable "sChan" to "iChan" in listener section, just because it was driving the ocd part of me nutz