Temporary OSPFv3 development commit
Fixes bug in OSPF packet retransmission.
If a DBDES packet from a master to a slave is lost, then the old codedoes not retransmit it and instead send a next one with the samesequence number. That leads to silent desynchronization of LSAdatabases.
Cleanup in packet.c. Deleted unused parameters.
dbdes indent an minor changes.
hello.c and hello.h cleaned up. No design changes.
lsa_cmp moved into lsalib.c
ospf.c and ospc.h splitted into various files.