Faulty torrent name and 'name' field when using relative path '.'

[rsnitsch]

@SMooxx reported in #10 that creating a torrent for a directory referenced via "." results in faulty torrent names.

Original report:

Another issue here. I used to use mktorrent which can support ‘relative path'.
But it seems py3createtorrent can't support 'relative path' here. For example, If I use it like this,
py3createtorrent -v -p 8192 -P -s FL -o ~/example.torrent -d -1 -t https://tracker/announce.php --exclude-pattern "(^.*\.r.*|sfv)$" ./
It will create a torrent with a wierd name [. ] in its name field, and I can't add this torrent to my torrent client anyway.

If I change the path to full path, the torrent created will be OK.

Link: #10 (comment)