Deprecate AF_MAX and PF_MAX

libc-test/test/linux_elf.rs

libc-test/test/linux_fcntl.rs

libc-test/test/linux_ipv6.rs

libc-test/test/linux_strerror_r.rs

libc-test/test/linux_termios.rs

src/fuchsia/aarch64.rs

src/fuchsia/x86_64.rs

src/unix/bsd/apple/mod.rs

src/unix/bsd/freebsdlike/dragonfly/mod.rs

src/unix/bsd/freebsdlike/freebsd/mod.rs

src/unix/bsd/netbsdlike/netbsd/mod.rs

src/unix/bsd/netbsdlike/openbsd/mod.rs

src/unix/haiku/mod.rs

src/unix/notbsd/android/mod.rs

src/unix/notbsd/emscripten/mod.rs

src/unix/notbsd/linux/mips/mod.rs

src/unix/notbsd/linux/musl/b32/arm.rs

src/unix/notbsd/linux/musl/b32/mips.rs

src/unix/notbsd/linux/musl/b32/powerpc.rs

src/unix/notbsd/linux/musl/b32/x86.rs