perf

Query server for performance data.:

bcfg2-admin perf
================ ========== ========== ========== =======
Name             Min        Max        Mean       Count
================ ========== ========== ========== =======
RecvStats        0.000378   0.001716   0.001367   5
GetConfig        0.018624   0.039495   0.023589   5
component_lock   0.000002   0.000057   0.000016   20
GetProbes        0.000523   0.000666   0.000591   5
RecvProbeData    0.002260   0.004550   0.002979