Remove the misleading "…is mandatory if you work in multiple monitors
setup", which hasn't been true since a while. Modern X systems do not
require Xinerama for mulithead any more. Therefore add a hint that it is a
legacy extension.
Closes: https://bugs.gentoo.org/634182
Closes: https://github.com/gentoo/gentoo/pull/5926
xface - Add xface support used to allow a small image of xface format to be included in an email via the header 'X-Face'
xft - Build with support for XFT font renderer (x11-libs/libXft)
xine - Add support for the XINE movie libraries
-xinerama - Add support for the xinerama X11 extension, which is mandatory if you work in multiple monitors setup
+xinerama - Add support for the (legacy) xinerama X11 extension
xinetd - Add support for the xinetd super-server
xml - Add support for XML files
xmlrpc - Support for xml-rpc library