cache: Don't send 2 packets as lookup reply
logger: Updates for new blackhole version
client: Fixed trans number in lookup's trans:cmd
logger: Updates for new blackhole version, again
tests: Added 3 more tests about lookup results
search: Print error if state not found

when search for the state for given ID only print error if there was
not state found, if we found that given server's node has to handle
this ID, do not print error.
weights: increase temporal selection-only (not state) weights (multiply by 10 on each step) until they sum up into large enough number for random selection

Small state weights will be summed into quite small value,
random generator will not be able to produce a value
with enough bits of entropy. In some cases @pos below
will always be zero ending up always selecting the first node.

This simple algorithm increases all weights until they sum up
to the large enough range.
client: Returned error from add_state with more sense