[PATCH] teach queryperf about SPF query type

[David Coulthart]

Trying to feed queryperf a data set captured from a production  
authoritative nameserver, I received the following message:
Query type not understood: SPF

The attached patch updates queryperf.c (from 9.5.0-P2) to understand  
the SPF QTYPE (99) as described in RFC 4408.  It impacts a couple more  
lines than absolutely necessary b/c I tried to keep the formatting  
clean.

HTH,
Dave Coulthart