[dev] [surf] 0.1 dist tarball broken

[Ray Kohler]

The surf 0.1 tarball doesn't build. (I'm packing it for Arch AUR.)
There are two problems: the tarball doesn't contain config.def.h ; and
even if it did, there is an extra variable "background" in it that's
not used, and kills the build because of -Werror. I'll work around
these in my PKGBUILD, but it seemed worth sliding the tag for.