gplugin/gplugin

Use a different (hopefully correct) Perl path on FreeBSD.
develop
2020-02-29, Elliott Sales de Andrade
43e4a29d523e
Use a different (hopefully correct) Perl path on FreeBSD.

Also, switch to expanded versions of those variable (*archexp).
[branchname]
master = default
develop = develop
feature = feature/
release = release/
hotfix = hotfix/
support = support/