- Remove irq_line methods from M6502, M6800, M6809, S2600 and replace uses with DEVCB_INPUTLINE
- Remove a few IRQ passthroughs from spiders.cpp
- Add several aliases for M6800_IRQ_LINE
- strprintf is unaltered, but strformat now takes one fewer argument
- state_string_export still fills a buffer, but has been made const
- get_default_card_software now takes no arguments but returns a string