* Better console error messages if 'ip2nets' can't match an IP address.

*    Better console error messages if 'ip2nets' can't match an IP address.

*    Fixed the LNET ping to handle signals properly.

*    Fixed overflow/use-before-set bugs in linux-time.h
     NB ???-time.h should also be checked; e.g. the same bugs had been
     cut and pasted into winnt-time.h; I've fixed the use-before-set
     but not the overflow issue there so I left a #error fttb.

*    Fixed ptllnd bug that wasn't initialising rx descriptors completely
     (sizeof(ptr) instead of sizeof(*ptr)).  This wasn't evident until the
     paths that catch malformed packets are exercised, so there are undoubtedly
     more to come.

*    Fixed a bug in LNET teardown that failed an assertion about the route
     table being empty if there was an error while it was being built.

*    Fixed a crash in LNetEQPoll(<invalid handle>)