Package spam_check: Information

- Thanslate all russian comments to english in all configs.
- Modify some default settings:
  + cfg_log_watch_mode = 1
  + cfg_ignore_mask = '' (empty)
- README.ALT: include block_list_arc.* to example settings
- Fix rotation number in logrotate script.
- Package accidently forgotten /var/lib/spam_check/blocklist

- Store blocklist in /var/lib/spam_check/ instead of /etc/spam_check/.
- Strip ".txt" postfix from default blocklist names.
- sources/spam_check.logrotate: add rotation of block_list_arc.
- arc_bl.sh, copy_bl.sh: quote variables, improve code appearance.
- arc_bl.sh, copy_bl.sh: use shell-error, rewrite config inclusion.
- copy_bl.conf: add more variables.
- copy_bl.sh: use variables for accessing files.
- arc_bl.sh: fix quoting.

- Add dependency on su(1)