Use bash arrays with one entry per line for better handling.

devtools 20230105-1 enables the debug option by default.

A follow-up commit will remove debug from alongside other options.

Switch to using the man page provided in the tarball.
Add debug package.

The man page upstream link has been updated in a previous build, but the file
had not been downloaded: https://bugs.archlinux.org/task/73878

Simplify quoting in file.
Simplify calls to make.

The dependency on libsndfile is missing, which has (somehow) been pulled in by lilv before:
https://bugs.archlinux.org/task/71278
Switch to a specific version of the upstream man page instead of downloading the latest.
Update maintainer info.