Log various data of download items during different events and startup time in rtorrent

[chros73]

Log various data of download items during different events and startup time in rtorrent (thx @pyroscope):

• in the view:
  • display startup time during startup
  • display event and various data of download
    • event, title, size, uploaded data, ratio, seeders/leechers scrape info, loaded time, disk free space, tracker
    • logged events: inserted_new, resumed, finished, hash_done, partially_restarted, erased

2018-04-26  8:18:04 LOADED     Great Southern Stand Breaking News - Stupid Warning Labels Comedy               1.4G  U:  0.0K  R: ·.00  S: ·/L: ·  26/04/2018  8:18:04 ( 47.3G) opentrackr.org
2018-04-26  8:18:04 STARTED    Great Southern Stand Breaking News - Stupid Warning Labels Comedy               1.4G  U:  0.0K  R: ·.00  S: ·/L: ·  26/04/2018  8:18:04 ( 47.3G) opentrackr.org
2018-04-26  8:19:01 COMPLETED  Great Southern Stand Breaking News - Stupid Warning Labels Comedy               1.4G  U:235.4M  R: ·.16  S:17/L: 6  26/04/2018  8:18:04 ( 45.9G) opentrackr.org
2018-04-26 11:19:01 DELETED    Great Southern Stand Breaking News - Stupid Warning Labels Comedy               1.4G  U:941.6M  R: ·.64  S:49/L: 2  26/04/2018  8:18:04 ( 45.9G) opentrackr.org

• into file as well:
  • create a .log directory for log files into /mnt/Torrents/.rtorrent/ dir
  • log into /mnt/Torrents/.rtorrent/.log/messages.log file
  • logrotate this file (without compressing it):
    • reserve 10 logs
    • size limit is 100KB
    • trigger it via cron once per day for the user, not as a system wide setting (it needs the user's permission)

Requires rTorrent-PS-CH 1.7.0 !
Refers to: chros73/rtorrent-ps-ch#122