Upstream fixes:
- Pass linker version script to the linker instead of the compiler.
- Compile with `-fPIC` again (regression from version 2.1.2).
- Out of bounds array access in `globpath`.
- Handling of `epoll_ctl` calls (they're now replayed after replacing
socket).
- GCC 10 build errors and Clang warnings.
While most of these fixes are more relevant for other distros, the
linker script fix is actually a regression existing since a long time
(version 1.x) and caused libip2unix to expose way too many symbols.
Built and tested on i686-linux and x86_64-linux.
Signed-off-by: aszlig <aszlig@nix.build>
67325b12c6