This commit updates all authorship and copyright information to include a
standard header that references the AUTHORS and CREDITS file. This standard
header was written by the Debian legal team at the request of Franck Joncourt.
Interim commit to add the VERBOSE variable to be stored in the fwknoprc file when
-v is used with --save-rc-stanza. The VERBOSE variable is also read by fwknop
and the verbosity level is set accordingly.
