Merge pdns precise/trusty configs, unbreak nescio

Commit 42d04e4 split out the pdns config into two different configs, one
for precise and one for trusty. Unfortunately, this broke nescio, which
still runs lucid.

Instead of adding yet another variant, remerge the two configs and just
add a versioncmp() conditional for the single statement that differed
between the two of them ("wildcards", removed in newer PowerDNS
versions).

Change-Id: Ie508a0caf6bcda982ff79c1f0a5d54db85233990