Attributes GH PR #637: https://github.com/ArcticaProject/nx-libs/pull/637

Reviewed-by: Ulrich Sibiller <uli42@gmx.de> --  Tue, 16 Jan 2018 06:03:18 -0800

hw/nxagent/Screen.c: Additionally check for noRRXineramaExtension set to FALSE before using the nxagentAdjustRandRXinerama() function and providing a Xinerama-like user experience.

 Fixes ArcticaProject/nx-libs#634.

nx-X11/config/cf/{gnu,lnx}Lib.rules: add RPATH entries for temporary nxcomp and nxcompshad libraries.

No change to the actually installed relinked nxagent(-relink) binary
that gets installed - only affects the temporary executable build
binary.

Attributes GH PR #623: https://github.com/ArcticaProject/nx-libs/pull/623

Fixes: ArcticaProject/nx-libs#616

nxcomp/src/Timestamp.{cpp,h}: use ::ctime_s or ::ctime_r instead of plain ctime, on-stack buffers and return std::string objects.

Fixes: ArcticaProject/nx-libs#616

Attributes GH PR #629: https://github.com/ArcticaProject/nx-libs/pull/629

Attributes GH PR #628: https://github.com/ArcticaProject/nx-libs/pull/628

Fixes: ArcticaProject/nx-libs#589

Got dropped by accident in 9bc6ff26

Fixes ArcticaProject/nx-libs#589

Attributes GH PR #567: https://github.com/ArcticaProject/nx-libs/pull/567

even if we issue a FatalError afterwards

I am not sure about the maximum font name length in X but just in
case use snprintf instead of memcpy to be sure nothing dangerous can
happen here.

This is a partial copy from XlibInt.c's _XPrintDefaultError, which had
some minor changes since being copied. Update to reflect these
changes. Also comment some more lines as their result was unused an
cluttered the output.

and insert one single space

Also comment the code and convert error messages to warnings.