Preconditions Handling

The SBC now handles preconditions at the dialog level. Previously, the SBC supported preconditions at the session level. This allows the SBC to support confirmation requests coming from different dialogs within a session.

HMR Regex Matching

An upgrade to Lua affects how the SBC adds headers on outgoing messages. When the header contains multiple values, the order of the values cannot be guaranteed. As a result, your regex patterns must not assume any specific order to the values of a header.