[Serusers] Checking Route

[Ron Shacham]

Hi.
I am new to SER.  I am trying to update the Route header.  In order to 
do this, I need to check the value of, for example, the first route 
entry, and push new routes.  Can someone give me some pointers about how 
to do this?  In general, how can I check the value of a header field.  
This is a basic question, but I haven't been able to find direction in 
the documentation.

Thanks,
Ron