Hpfs log file sync and fork detection. (#279)

Basic infrastructure for log file sync.
A fork is detected by comparing the hpfs log index file against the ledger.
Min and max ledger sequence hashes are sent to a full history node to request log history.

src/ledger/sqlite.cpp

@@ -377,4 +377,4 @@ namespace ledger::sqlite
         ledger.output_hash = GET_H32_BLOB(9);
     }
 
-} // namespace ledger::sqlite
+} // namespace ledger::sqlite