expose server version to xlat

expose server version to slat (so we can print it out in e.g. line log
with %v).

I note that a few expansions are present but are in variables.rst -
e.g.  %C, %V and %Z
raptor module - uses line log

log format for RAPTOR - a JISC project for accounting of authentication
information - graphing your AAA - https://iam.cf.ac.uk/trac/RAPTOR
updated TERENA dictionary

eduroam-Monitoring-Inflate and fixed ‘Eduroam’ entry
Merge pull request #563 from alanbuxey/v3.0.x

expose server version to xlat