Add case for GNU Tar as gtar (OpenBSD)

clear-repo.sh

@@ -24,7 +24,12 @@ init() {
 }
 
 clearRepo() {
-  stream=$(tar xOf $repo_directory/$repo_db_file --wildcards */desc | awk -f $awk_rules_file)
+  if [ "$(uname)" = "OpenBSD" ]; then # TODO This could probably be done better (like with actually checking if tar is GNU...
+    gnutar="gtar"
+  else
+    gnutar="tar"
+  fi
+  stream=$($gnutar xOf $repo_directory/$repo_db_file --wildcards */desc | awk -f $awk_rules_file)
 
   OIFS=$IFS
   IFS='|'