The filter now accepts (in addition to the old "match" and "server")
parameters of the form "matchN" and "serverN", where N is a decimal
number with two digits, i.e 01, 02, 03 .. 20. When routing queries,
the regural expressions will be tested one by one, and the servers
from the first match will be added as hints. Also, a single "server"-
setting may contain multiple servers separated by ','. The server
names are not verified to be actual servers, this is up to the user.
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