Add link to profitux' webmail

dotfiles/bmo/uris.ini

     tor     = https://theoldreader.com/
     tw      = https://twitter.com/
     w       = http://en.wikipedia.org/
+    wpc     = https://webmail.profitux.cz/
     xkcd    = http://xkcd.com/
     zoo     = http://www.zooborns.com/