When working in server environment its sometimes necessary to get the host name of the device running on (as friendly name for example). And as Rust already has std::net and also DNS resolution, getting the devices host name seems kinda missing in this environment.
And as its standard it the Internet that every device has a host name (at least for DHCP) it should be implementable for all targets with std.
There is already a crate called gethostname with only one function gethostname, which could be taken as inspiration for the implementation of this method in std::net.