::clone_from_slice(), an efficient way to copy the data from one sliceand put it into another slice.
Various convenience methods on Ipv4Addr and Ipv6Addr, such as is_loopback(),which returns true or false if the address is a loopback address according toRFC 6890.
Various improvements to CString, used for FFI.
checked, saturated, and overflowing operations for various numeric types.These aren’t counted in that ‘40’ number above, because there are a lot ofthem, but they all do the same thing.