Document PARKINGSLOT variable in features.conf.sample

(issue ASTERISK-16239)
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Merged revisions 348154 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 348155 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@348156 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configs/features.conf.sample

@@ -43,6 +43,8 @@ context => parkedcalls          ; Which context parked calls are in (default par
                                 ;         created in the 'park-dial' context.  This extension will be set up to do a
                                 ;         Dial() to 'SIP/0004F2040001'.
                                 ;
+								;         During the timeout procedure, the following variable is set
+								;         PARKINGSLOT - extension that the call was parked in prior to timing out
 
 ;courtesytone = beep            ; Sound file to play to when someone picks up a parked call
                                 ; and also when the Touch Monitor is activated/deactivated.