Add MTU #140

Job	Run time
Check (ubuntu-latest)	23s
Check (macOS-latest)	11s
Check (windows-latest)	1m 30s
Cross compile (armv7-linux-androideabi)	52s
Rustfmt	6s
Cross compile (x86_64-unknown-netbsd)	28s
Cross compile (x86_64-unknown-linux-musl)	36s
Cross compile (i686-unknown-linux-musl)	33s
Cross compile (aarch64-linux-android)	48s
Cross compile (x86_64-unknown-freebsd)	27s
	5m 54s

Provide feedback