Allow the user to pass in a hostname to the connect functionality
instead of just an ip address. The call to gethostbyname(..) handles
both seamlessly for us.
Update the argument name / usage message accordingly.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
There's no point in using different, seemingly randomly sized buffers as
the required size for storing an IPv4 address representation is well
known (16 bytes).
