[core] consider offline links as finished

This change considers (permanently) offline links as finished. Although
they are not technically finished in being downloaded, they also never
will be so there is no reason not to dispatch `package_finished`. This
allows plugins and scripts to further process the files.

Note that this does not adjust the progress display in queue, allowing
users to check why their progress never finishes and decide what to do
with the package or links in question.

Fixes pyload#4392

src/pyload/core/database/file_database.py

@@ -399,11 +399,16 @@ def get_plugin_job(self, plugins):
     @style.queue
     def get_unfinished(self, pid):
         """
-        return list of max length 3 ids with pyfiles in package not finished or
-        processed.
-        """
-        self.c.execute(
-            "SELECT id FROM links WHERE package=? AND status NOT IN (0, 4, 13) LIMIT 3",
+        return list of max length 3 ids with pyfiles in package not:
+        - finished (0)
+        - offline (1)
+        - skipped (4)
+        - processed (13)
+        """
+        self.c.execute("""
+            SELECT id FROM links WHERE package=?
+            AND status NOT IN (0, 1, 4, 13) LIMIT 3
+            """,
             (str(pid),),
         )
         return [r[0] for r in self.c]

src/pyload/core/threads/download_thread.py

@@ -103,6 +103,7 @@ def run(self):
                     self.pyload.log.warning(
                         self._("Download is offline: {}").format(pyfile.name)
                     )
+                    self.pyload.files.check_package_finished(pyfile)
                 elif msg == "temp. offline":
                     pyfile.set_status("temp. offline")
                     self.pyload.log.warning(