$ ls /usr/share/doc/vpnc* /usr/share/doc/vpnc: COPYING /usr/share/doc/vpnc-0.5.1_p332: README TODO VERSION This can be a bit annoying. It seems upstream installs COPYING there, so one possibility is just moving COPYTING to /usr/share/doc/${PF} or asking upstream to install README, TODO and VERSION in /usr/share/doc/vpnc. Probably the first is the easiest.
COPYING should not be installed, as we ship the license in the license subdir of the Portage tree. Fixed. Thanks for the report.