Lintian Fixes - mat2

Ready changes

Summary

Diff

diff --git a/debian/upstream/metadata b/debian/upstream/metadata
new file mode 100644
index 0000000..dc51cc4
--- /dev/null
+++ b/debian/upstream/metadata
@@ -0,0 +1,5 @@
+---
+Bug-Database: https://0xacab.org/jvoisin/mat2/-/issues
+Bug-Submit: https://0xacab.org/jvoisin/mat2/-/issues/new
+Repository: https://0xacab.org/jvoisin/mat2.git
+Repository-Browse: https://0xacab.org/jvoisin/mat2

Debdiff

File lists identical (after any substitutions)

No differences were encountered in the control files

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