Dropping Solaris support V2

[Jürgen Groß <jgross@xxxxxxxx>]

Time to ask once again: do we want to drop Solaris support?

Reason for asking: since commit 38eeb3864de40 Xenstore isn't supported
on Solaris any longer, as Solaris has no support for mapping memory via
libxengnttab.

There has been no activity at all on the related Open-Solaris branch
since Xen 3.4 (apart from a question to add Xen 4.2 or 4.3 support 7
years ago).

Thoughts?


Juergen