Add PoC IRC notification functions based on notifirc

dotfiles/imapfilter/common/functions.lua

+os = require "os"
 socket = require "socket"
 
 function shortname()
     return mbox.FILTER_QUEUE:is_newer(84)
 end
 
+function _notifirc1(structure)
+    --notify about message using (pre-configured) notifirc
+    os.execute('notifirc "A funny message arrived!"; notifirc "too bad we are SO WEAK"')
+end
+
+function notifirc_all(seq)
+    for _, mesg in ipairs(seq) do
+        mbox, uid = table.unpack(mesg)
+        structure = mbox[uid]:fetch_structure()
+        _notifirc1(structure)
+    end
+end
+
 function _partinf_compare(a, b)
     if not type(a) == type(b) then
         return false