[sort] Suggestion: count keys from the end of record

[Renaud Pacalet]

I am a bit surprised that it has never been suggested before but I could 
not find any trace of it, so here it is:

Would it be possible to specify the sorting keys from the end of the 
record, instead of the beginning. Something like sort -k-1,-1 to sort on 
the last field of each record, sort -k-2,-2 for the second to last...

This would be handy when the format has a variable number of fields per 
record but the last records are well defined.
--
Renaud Pacalet
Télécom Paris
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