* treewide: http -> https sources
This updates the source urls of all top-level packages from http to
https where possible.
* buildtorrent: fix url and tab -> spaces
Semi-automatic update. These checks were performed:
- built on NixOS
- ran `/nix/store/dnqszp481y82724zpmcgag2glhs8n18s-libabw-0.1.2/bin/abw2raw --version` and found version 0.1.2
- ran `/nix/store/dnqszp481y82724zpmcgag2glhs8n18s-libabw-0.1.2/bin/abw2html --version` and found version 0.1.2
- ran `/nix/store/dnqszp481y82724zpmcgag2glhs8n18s-libabw-0.1.2/bin/abw2text --version` and found version 0.1.2
- found 0.1.2 with grep in /nix/store/dnqszp481y82724zpmcgag2glhs8n18s-libabw-0.1.2
- found 0.1.2 in filename of file in /nix/store/dnqszp481y82724zpmcgag2glhs8n18s-libabw-0.1.2