SIP Express Router

Added experimental support for OS X, support for multiple private enum trees, and a variety of nathelper improvements.

This release adds a new subst function in the textops module, a
new commandline option for checking the configuration file, and
extended operator support in the configuration file. The new commands
set_advertised_address and set_advertised_port can be used to control
what IP address will be printed in SIP messages (useful for NAT
traversal). The Remote-Party-ID value can now be stored in the database
(in addition to the radius server). The permissions of the FIFO
interface are now more restrictive. Some minor bugs in different modules
have been fixed.

This release includes many significant changes. It is fully RFC3261 compliant. New features include cross-protocol forwarding, TCP, loose routing, ENUM support, hosting of multiple domains, improved accounting, full integration with radius, NetBSD support, experimental PostgreSQL support, updated documentation, and a voicemail interface. A SIP tutorial is included.

In this version, authentication of CANCEL will always succeed, there is now a separate package for the Jabber module, there are some FreeBSD mysql bugfixes, there is OpenBSD (3.2) partial support, and there are some textop module bugfixes, MySQL accounting support, and a Jabber module cleanup.