Update features.conf.sample atxferdropcall option.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@396793 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configs/features.conf.sample

@@ -106,16 +106,12 @@ context => parkedcalls          ; Which context parked calls are in (default par
 ;featuredigittimeout = 1000     ; Max time (ms) between digits for
                                 ; feature activation  (default is 1000 ms)
 ;recordingfailsound = beeperr   ; indicates that a one-touch monitor or one-touch mixmonitor feature failed
-								; to be applied to the call. (default: no sound)
+                                ; to be applied to the call. (default: no sound)
 ;atxfernoanswertimeout = 15     ; Timeout for answer on attended transfer default is 15 seconds.
-;atxferdropcall = no            ; If someone does an attended transfer, then hangs up before the transferred
-                                ; caller is connected, then by default, the system will try to call back the
-                                ; person that did the transfer.  If this is set to "yes", the callback will
-                                ; not be attempted and the transfer will just fail.
-                                ; For atxferdropcall=no to work properly, you also need to
-                                ; define ATXFER_NULL_TECH in main/features.c.  The reason the
-                                ; code is not enabled by default is spelled out in the comment
-                                ; block near the top of main/features.c describing ATXFER_NULL_TECH.
+;atxferdropcall = no            ; If someone does an attended transfer, then hangs up before the transfer
+                                ; target answers, then by default, the system will try to call back the
+                                ; person that did the transfer.  If this is set to "yes", the ringing
+                                ; transfer target is immediately transferred to the transferee.
 ;atxferloopdelay = 10           ; Number of seconds to sleep between retries (if atxferdropcall = no)
 ;atxfercallbackretries = 2      ; Number of times to attempt to send the call back to the transferer.
                                 ; By default, this is 2.