MFH (CVS) L2TP server implementation. Also add checks on most *_sort functions to handle error cases.
MFH (CVS) L2TP server implementation.
Also add checks on most *_sort functions to handle error cases.

dennypage/pfsense,NewEraCracker/pfsense,dennypage/pfsense,ptorsten/pfsense,phil-davis/pfsense,ptorsten/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,pfsense/pfsense,ch1c4um/pfsense,BlackstarGroup/pfsense,ch1c4um/pfsense,NOYB/pfsense,jxmx/pfsense,pfsense/pfsense,brunostein/pfsense,brunostein/pfsense,NewEraCracker/pfsense,phil-davis/pfsense,brunostein/pfsense,NOYB/pfsense,NOYB/pfsense,jxmx/pfsense,phil-davis/pfsense,dennypage/pfsense,jxmx/pfsense,ptorsten/pfsense,NewEraCracker/pfsense,BlackstarGroup/pfsense,dennypage/pfsense,pfsense/pfsense,BlackstarGroup/pfsense,ch1c4um/pfsense,ch1c4um/pfsense,pfsense/pfsense,BlackstarGroup/pfsense