fix possible segfault in rtpproxy-ng
(cherry picked from commit 8098f4bfdf573032f79374d3d4b231920517257c)
fix get_redirects core dump ( Closes: FS#337 )
(cherry picked from commit f15dbc9b1a97a68a2227d2b58484ff9a65e8c1c3)
uac_redirect patch merged upstream. Will be included on next 4.0 series
(cherry picked from commit 9fabbf154aa7679edb0536a812621baae5087e93)
update changelog