The net-analyzer/wireshark-1.4.3 ebuild with USE=doc has a dependency on elinks. This is pointless, because elinks is used only to generate the plain text release notes which ship with the package as NEWS. The build system is designed to tolerate the absense of elinks. This dependency is especially pointless because when elinks is available, the file that it generates isn't even installed by the ebuild: only the shipped NEWS file is. The dependency on elinks should just be removed.
Thank you for report! Fixed in wireshark-1.4.4.