lvd2

Considering changing the signature of read/write callbacks

3

Now their signature is `byte (int param, ushort addr)` which prevents it from passing a pointer to the whatever one would want to (classes or structures or another function pointers...

This is more proof of concept than anything really needing merge into master, mostly because this breaks binary compatibility in librhash. Any comments are welcome :)

Clock dividers get crazy in this case. To fix, delay rst_n deassertion several nans from posedge of clk.

Add standalone testbench for z80 core; run Patrik Rak tests on it

1

Patrik Rak's tests (https://github.com/raxoft/z80test) are mainly targeted to the weird behaviour of F3/F5 flags during or after SCF/CCF commands. Here I've made a testbench to run them and collect logs....

More on this in my PR here: https://github.com/nukeykt/Nuked-MD-FPGA/pull/19#issue-2905004489 Test results could be found here: https://github.com/lvd2/Nuked-MD-FPGA/tree/main/z80_tb/test_results

Background: after doing backup of some hierarchy to the target machine (probably with different OS/distro/etc), some symlinks might become dangling (pointing nowhere) or point to existing file but with different...

### What is the issue? If doing `transmission-remote -t active -l` right after the start of the daemon, it would report all known torrents instead of an expected empty list....