fix a regression from previous commit
for those internal extension that list in extension.conf like call-forward(*21*).
The Read() function that used to got the target number could not retrieve the DTMF with the previous fix as it was not handled by asterisk core.
[sip0-direct]
exten => _*21*,1, GoSub(sub-create_cfim,s,1(sip0))
exten => _*61*,1, GoSub(sub-create_cfbs,s,1(sip0))
exten => _*67*,1, GoSub(sub-create_cfb,s,1(sip0))
[sub-create_cfim]
;
; ${ARG1} - Associated SIP peer
;
exten => s,1, Read(input,,,,,300)
exten => s,n, Set(DB(CFIM/${ARG1})=${input})
exten => s,n, Playback(beep)
exten => s,n, Hangup()