Application Tracking: APBR support

The AppTrack feature is enhanced to include advanced policy-based routing (APBR) details. AppTrack, an application tracking tool, collects byte, packet, and duration statistics for application flows in the specified zone. As a part of the enhancement to support APBR, AppTrack syslog message now include destination interface details. A new AppTrack syslog message is introduced to include APBR profile, rule, and routing instance details. This message is generated for the session when APBR is applied to the session. In addition, the show security application-tracking counters command, which displays AppTrack counters, is updated to include a new counter to indicate the number of times a new route update log is generated.