Default the X11 dynamically loading on if the OS loader loads libraries with their private symbols hidden.  If that isn't the case, and someone tries to enable it anyway, spit out a warning and don't let them do it.
Default the X11 dynamically loading on if the OS loader loads libraries
with their private symbols hidden.  If that isn't the case, and someone
tries to enable it anyway, spit out a warning and don't let them do it.


git-svn-id: 75429ccc2030f235ccf16e6b9b7f8e83d5edd22e@2552 c70aab31-4412-0410-b14c-859654838e24

albertz/sdl,albertz/sdl,albertz/sdl,albertz/sdl