* src/sys/netinet/ip_input.c(ip_reass): ip_nfragpackets is increasing by dropping fragments due to mbuf starvation and eventually exceeds ip_maxfragpackets, which results in refusing all fragments later. On the other hand, nipq and maxnipq can be used as a substitute for ip_nfragpackets and ip_maxfragpackets. This fix is the collection of the fixes done at the following revisions of freebsd main branch; 1.221, 1.222, 1.223 and 1.229.