Merged revisions 173211 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r173211 | jpeeler | 2009-02-03 15:57:01 -0600 (Tue, 03 Feb 2009) | 17 lines
  
  Parking attempts made to one end of a bridge no longer will hang up due to a
  parking failure.
  
  Parking attempts made using either one-touch, or doing either a blind or 
  assisted transfer to the parking extension now keep up the bridge instead of
  hanging up the attempted parked party. Normal causes for the parking attempt
  to fail includes the specific specified extension (via PARKINGEXTEN) not being 
  available or if all the parking spaces are currently in use. To avoid having
  to reverse a masquerade park_space_reserve was made to provide foresight if
  a parking attempt will succeed and if so reserve the parking space.
  
  (closes issue #13494)
  Reported by: mdu113
  
  Reviewed by Russell: http://reviewboard.digium.com/r/133/
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@173500 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/features.h

@@ -67,6 +67,7 @@ struct ast_call_feature {
 #define AST_FEATURE_RETURN_STOREDIGITS              22
 #define AST_FEATURE_RETURN_SUCCESS                  23
 #define AST_FEATURE_RETURN_KEEPTRYING               24
+#define AST_FEATURE_RETURN_PARKFAILED               25
 
 /*!
  * \brief Park a call and read back parked location