Crate port_check

Functions

free_local_port	Returns an available localhost port
free_local_port_in_range	Returns an available localhost port within the specified range.
is_local_port_free	Returns whether a port is available on the localhost
is_port_reachable	Attempts a TCP connection to an address and returns whether it succeeded
is_port_reachable_with_timeout	Attempts a TCP connection to an address and returns whether it succeeded