Add support for the WebKit HTML rendering/layout engine

Packages describing “webkit” as local USE flag

Package “webkit” Flag Description
dev-util/glade Build catalog support for net-libs/webkit-gtk:4 widgets.
app-text/libgepub Build with GepubWidget based on Webkit
net-libs/libproxy Use libjavascriptcoregtk from net-libs/webkit-gtk for PAC parsing

All packages providing a “webkit” USE flag (11)