Split off from bug 465554. The package is currently labelled "as-is", but I cannot find any license in its distfile (it's a single FORTRAN file) or on its homepage. Unless someone can provide information on its distribution terms, I suggest that we change it to LICENSE="all-rights-reserved" and add mirror and bindist restriction.
*herwig-6.5.21 (04 Jun 2013) 04 Jun 2013; Sébastien Fabbro <bicatali@gentoo.org> +herwig-6.5.21.ebuild, -herwig-6.5.20.ebuild, herwig-6.5.10.ebuild, metadata.xml: Version bump and fixed licensing (bug #470800)