Remove WWW entries moved into port Makefiles
Commit b7f05445c00f has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.
This commit removes the WWW: lines of moved-over URLs from these
Approved by: portmgr (tcberner)
benchmarks/nbench: fixing master site and the homepage entry
Fixing the URLs for master site and home page.
The previous entries based on tux.org are not available anymore.
Approved by: olivier (mentor)
Differential Revision: https://reviews.freebsd.org/D12166