Make munmap use funmap2

.editorconfig

Cargo.lock

Cargo.toml

redoxer.sh

src/header/sys_mman/linux.rs

src/header/sys_mman/mod.rs

src/header/sys_mman/redox.rs

src/platform/redox/mod.rs

src/platform/redox/ptrace.rs

tests/Makefile

tests/sys_mman.c