compat(REUSE): init configuration

[ju1m]

This PR introduces a minimal REUSE configuration.

$ reuse lint
# SUMMARY

* Bad licenses: 0
* Deprecated licenses: 0
* Licenses without file extension: 0
* Missing licenses: 0
* Unused licenses: 0
* Used licenses: MIT
* Read errors: 0
* Files with copyright information: 819 / 819
* Files with license information: 819 / 819

Congratulations! Your project is compliant with version 3.3 of the REUSE Specification :-)

[phanirithvij]

Can we try to keep the original LICENSE file? because github shows it like this

[ju1m]

@phanirithvij , well spotted! indeed that's what repos like cURL currently choose to do.