Updated source file header comments to GPL v3+ for package: freenet.io
Updated source file header comments to GPL v3+ for packages:

freenet.io.comm
freenet.io.xfer
Updated source file header comments to GPL v3+ for package: freenet.keys
Updated source file header comments to GPL v3+ for package: freenet.l10n
Updated source file header comments to GPL v3+ for package: freenet.node
Updated source file header comments to GPL v3+ for package: freenet.node.fcp