Clear up copyright statements.
Clear up copyright statements.

Conflicts:

	src/vmod_example.vcc

Merge notice: No part of the commit for vmod_example.vcc was included, new
format does not apply to 3.0.

nigoroll/libvmod-example,nigoroll/libvmod-example,franciscovg/libvmod-example,franciscovg/libvmod-example