- added checksum.c for fletcher checksum function
- added lsa.c for lsa definitions
- added set_router_lsa to generate local router's lsa
- added numerous structs / defines for LSAs (based on the quagga lsa
structs)
- added replay_interface struct to encapsulate ifreq and hold all
needed details on the system's interfaces
- changed functions / structs using ifreq to reference replay_interface
instead
- cleaned up build errors
- added and initialized count members to ospf struct for the nbr, pfx,
and if lists
- added active pfx count for pfx list members which have a valid ospf
interface
- build error/warning cleanup