+ sub cat_add()
+ sub get_http_status()
+ sub test_and_replace_with_funcref() with example link_replace_re0()
bugfix: in cleanup_wiki_page()
bugfix: regexp in in table_body2array()
bugfix: re_url_class in link_replacement()
get rid of smartmatch operator (since it got experimental since perl 5.18)
cleaned up some code
allow using cookie for re-login
print error if login fails
save_wiki_page() may now be able to cope with urt8 pages, hopefully
use LWP instead of WWW-Mechanize for checking http status (faster!)