5.2.2: rfe12517 and performance testing

rfe12517: nfs configuration: Host lists: allow hostname in "New
address" field.  (In the process, I found that configure/ipaddr.cl was
a copy of stuff in ipaddr.cl!)  When loading the figuration and
resolving the host names, warn if the conversion of saved host names
fails and ignore the failed ones.

test/performance.sh: use localhost instead of our host name to see if
we can get more consistent test results (seems to).

Update test/performance.log.5.1 with a new baseline run.
Update test/performance.log.5.2.1 with a new run.