dev-menu: remove LINk+VLINK override
libcurl/_links.html: remove references

This file was not used.
menu: removed the lib* menu leftovers
setup: make LINK a clickable link as well
Revert "setup: make LINK a clickable link as well"

This reverts commit 1210bb3f5c8cac5ad599824d8fbe9382df684787.
css: 'aboutbox' is gone
CSS: changed padding in the menu