add migrator for previous bugs

lbrynet/extras/daemon/migrator/migrate9to10.py

@@ -0,0 +1,20 @@
+import sqlite3
+import os
+
+
+def do_migration(conf):
+    db_path = os.path.join(conf.data_dir, "lbrynet.sqlite")
+    connection = sqlite3.connect(db_path)
+    cursor = connection.cursor()
+
+    query = "select stream_hash, sd_hash from main.stream"
+    for stream_hash, sd_hash in cursor.execute(query):
+        head_blob_hash = cursor.execute(
+            "select blob_hash from stream_blob where position = 0 and stream_hash = ?",
+            (stream_hash,)
+        ).fetchone()
+        if not head_blob_hash:
+            continue
+        cursor.execute("update blob set should_announce=1 where blob_hash in (?, ?)", (sd_hash, head_blob_hash[0],))
+    connection.commit()
+    connection.close()