step-42.cc still had an old QPL license header
step-42.cc still had an old QPL license header

Updated it to the new copyright header mentioning the LGPL and
reconstructed the authors of step-42.cc from its svn history.

git-svn-id: 31d9d2f6432a47c86a3640814024c107794ea77c@30288 0785d39b-7218-0410-832d-ea1e28bc413d

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