Add "silent call" feature to OpenBSC

This allows the administrator to use the vty interface to issue a silent
call to a given subscriber by using
	"subscriber extension XXXX silent call start"
and stopping that silent call with
	"subscriber extension XXXX silent call stop"
4 files changed
tree: 207e093f409c9d8b5951c265ecfaf2180932243f
  1. hlrsync/
  2. linux-kernel/
  3. openbsc/
  4. wireshark/