Log Message:
Update to 0.99.16.  DESTDIR support.  LICENSE is gpl2.  Cosmetic fixup
to options.  Changes since 0.99.15:

bgpd:
    use monotonic clock for time of day
    code cleanup
    compile warnings cleanup
    work around warning in assegments_parse()

ospfd:
    fix debug messages that were masked by DISCARD_LSA
    remove unneeded memset from a very hot function
    VTY strings cleanup
    comment out unused function
    make local functions static
    enable more OSPF cost command aliases

lib:
    fix memory logging
    make some structures constant
    move check_bit into prefix common code
    fix warning on little endian
    make match functions take const args
    remove unused function: route_dump_node()
    log source of vty connections (bug #566)

zebra:
    change router-id selection algo
    deal with irdp compile warnings
    cleanup RIB meta queue code
    fix more warnings in rtadv
    fix more compiler warnings
    remove unused function to fix warning
    handle RTF_CLONING removal from FreeBSD 8.0
    fix argument reference in strncpy() call for BSD
    fix RIB debug message for IPv6
    make declaration const in rtm_flag_dump()
    fix router advertisements for non-Ethernet link layer addresses

ospf6d:
    remove dead code
    fix warnings from recent prefix bit commit
    review LSA sequence number comparison
    fix LSA locking in ospf6_new_ls_id()

other:
    ripd: fix compiler warnings
    ripngd: compiler warnings cleanup
    isisd: fix --enable-isis-topology for 64-bit Linux
    isisd: fix BPF ioctl() calls, treat "true" and "false" \ 
as reserved
    configure: fix spelling
    configure: fix HAVE_CLOCK_MONOTONIC spelling