Anthony DeRobertis authored
First up, just s/buster/bullseye/g. See how much work we have to do to get this building and working with Bullseye. Not anticipating much, but you never know. Second, update LEGAL file with SPDX data. Appears it's now required, causing the build to fail. There isn't an exception that matches our OpenSSL exception (but it close to openvpn-openssl-exception — that may be where I got the language from). Update the copyright year, too. Third, add perl-xs-dev. Appears to be needed to build now.