[PATCH] Properly filter the renameat2 syscall introduced in Linux v3.15.
Handle the renameat2 syscall analogous to renameat, as their only difference is an additional flags attribute, which isn't relevant to the path based adjustments performed by proot.
Disable seccomp-based tracing performance improvement It is faster (according to upstream documentation), but on current (4.8.4+) kernels it just segfaults. Software that works slowly seems better than software that doesn't work at all.
