upgrade unlang from 2.1.12 to 3.0.14

[adrian.p.smith at bt.com]

>> Using the details module, how can I use an Access-Reject to make an Accounting Request in the way I was doing above?

 > Hmm... you can't, so that is an issue.  It's why we're redesigning that whole part of the server in v4.

 > Unfortunately, the changes from v2 to v3 were pretty much mandated by security and consistency, so that can't change.

 > If you need performance, it's pretty simple to write a C module to do this work.  Just copy the detail module and change it to print the attributes you need, including hard-coded ones.




That's a shame as I was advised to upgrade to get another requirement working, but I cannot do that if I lose previous functionality. 

Will try and take a look at the module.