~jack/mudcore

Fix documentation generation

doc/Makefile.am: Use `\\` in sed call.
CI: Remove `nixpkgs` repository since we're on flakes
flake.lock: Update

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/f7b3c975cf067e56e7cda6cb098ebe3fb4d74ca2?narHash=sha256-Dt/wOWeW6Sqm11Yh%2B2%2Bt0dfEWxoMxGBvv3JpIocFl9E%3D' (2024-03-01)
  → 'github:hercules-ci/flake-parts/8471fe90ad337a8074e957b69ca4d0089218391d?narHash=sha256-XOQkdLafnb/p9ij77byFQjDf5m5QYl9b2REiVClC%2Bx4%3D' (2024-08-01)
• Updated input 'flake-parts/nixpkgs-lib':
    'github:NixOS/nixpkgs/1536926ef5621b09bba54035ae2bb6d806d72ac8?dir=lib&narHash=sha256-cy6ArO4k5qTx%2Bl5o%2B0mL9f5fa86tYUX3ozE1S%2BTxlds%3D' (2024-02-29)
  → 'https://github.com/NixOS/nixpkgs/archive/a5d394176e64ab29c852d03346c1fc9b0b7d33eb.tar.gz?narHash=sha256-uFf2QeW7eAHlYXuDktm9c25OxOyCoUOQmh5SZ9amE5Q%3D' (2024-08-01)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/3b7873ea139ac04bb7d2ccf3e6306e01a9d706d5?narHash=sha256-/8pFeeY8u4i%2B8u6KDkhJsmQvdAWWAO%2BPCAPtZsy8Gco%3D' (2024-03-09)
  → 'github:nixos/nixpkgs/b4f7fb71438d00539b21f1b1e6968c0eac060127?narHash=sha256-zzbqHmY1mt21omyk1%2B14QbAkII1B7OHlwKLcczVq22w%3D' (2024-08-29)
Don't try to be smart about whether or not to syslog/console log
README.md: Remove old nix commands

The flake-compat files went away from the repo a little while back.
lua: fix zmq_recv
lua: Fix mudcore.zmq.NULL
lua: Fix library function registration
flake.nix: Add `inetutils` to dev shell (provides `telnet`)
Make mudcore log levels match syslog levels
src/options.h: Documentation nit
flake.nix Add `gdb` to development shell
Add syslog logging
Remove logging to files
flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/1ac6627fa430e1a8e9b6c7da50b40cdf722b02e8' (2023-08-02)
  → 'github:nixos/nixpkgs/3b7873ea139ac04bb7d2ccf3e6306e01a9d706d5' (2024-03-09)
flake.nix: move to flake-parts
README.md: Fix Lua version number
.builds/debian.yml: Fix CI
flake.nix: Use lua 5.4
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