Ville Skyttä writes:
could find. Nowadays there's a real mercurial backend (vc-hg.el)
in GNU
Emacs CVS; I haven't looked at what it offers, but it's under GPLv3+ so I
don't think we could import it into the XEmacs packages tree currently
anyway.
AFAICS there's no reason why we can't change individual packages to
GPLv3+ as long as they are not XEmacs-specific. As long as there are
multiple Lisp engines that support the code, they're not part of
XEmacs per se. We just have to distribute them separately, which we
do.
The problem with TRAMP is that since we don't support GNU's syntax but
have our own idiosyncratic syntax, we need to be more careful there.
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