* src/payproc-post.c: New.
* src/util.c (ascii_strupr): New.
(keyvalue_put_idx): New.
(keyvalue_put_meta): New.
* src/t-util.c: New.
* src/preorder.c (open_preorder_db): More prepared statements.
(get_text_column, (get_columns): New.
(get_preorder_record):  New.
(update_preorder_record): New.
(preorder_get_record): New.
(preorder_update_record): New.
* src/journal.c (jrnl_store_charge_record): Write Sepa-Ref.
* src/commands.c (cmd_commitpreorder):
(cmd_getpreorder):
(cmd_ppipnhd): New with code factored out from connection_handler.
(cmd_help): New.
(cmdtbl): New.
(connection_handler): Use a table to dispatch commands.
* src/protocol-io.c (read_data): Ignore comment lines.