some l2tp fixes
simplify range management
fixed last commit
remove range name
add breadcrumbs
fixed typos
fixed tunnels() after RangeTable removal
fixed save changes
fix writing of ip range in l2tp conf
change auto=start to auto=add as pointed out in https://tracker.zentyal.org/issues/1289
set sysctl options required by ipsec verify
Merge pull request #1599 from Zentyal/jacalvo/l2tp-fixes

Jacalvo/l2tp fixes