for TCP. Now both struct ipfr_qent, struct ipfr_queue and hashed fragment queue are abstracted and no longer public.
Make struct ipq private and struct ipqent not visible to userland. Push ip_len adjustment into reassembly layer. OK matt@
into ip_reass_init(), ip_reass_lookup(), etc (note: abstraction is not yet complete). No functional changes to the actual mechanism. OK matt@