Make sure character soft deletes do not reserve name once deleted, add optional retro script to run for servers who had soft deletes running prior to this commit

utils/sql/git/optional/2020_01_26_soft_delete_retro.sql

@@ -0,0 +1,12 @@
+-- Run this to un-reserve deleted characters
+UPDATE
+  character_data
+SET
+  name = SUBSTRING(
+    CONCAT(name, '-deleted-', UNIX_TIMESTAMP()),
+    1,
+    64
+  )
+WHERE
+  deleted_at IS NOT NULL
+  AND name NOT LIKE '%-deleted-%';