classes: split up run() into run() and runline()

This helps the debugging process, by allowing us to also inject lines directly into the protocol module.

classes.py

@@ -207,8 +207,11 @@ class Irc():
                 line = line.strip(b'\r')
                 # FIXME: respect other encodings?
                 line = line.decode("utf-8", "replace")
+                self.runline(line)
+
+    def runline(self, line):
+        """Sends a command to the protocol module."""
         log.debug("(%s) <- %s", self.name, line)
-                hook_args = None
         try:
             hook_args = self.proto.handle_events(line)
         except Exception: