Site "http://zerowing.idsoftware.com/linux/etqw/" that is suggested by the fetch-restriction message to download "ETQW-client-1.5-full.x86.run" file from, does not contains it. The file can be dowloaded directly from URL: ftp://ftp.i3d.net/Games/Enemy Territory Quake Wars/Patches/ETQW-client-1.5-full.x86.run Fetch restriction is not needed.
updated in portage. thanks for the bug report.