[linux] LIRC plugin tracebacks if lircd not running

Mostly a code issue. It'd be nice to implement the connectionFailed of our LIRC Twisted protocol. Relevant traceback:

Traceback (most recent call last):

  File "/usr/lib/python2.5/site-packages/twisted/internet/gtk2reactor.py", line 175, in run

    self.__run()

  File "/usr/lib/python2.5/site-packages/twisted/internet/gtk2reactor.py", line 114, in wrapper

    return real_cb(real_s, condition)

  File "/usr/lib/python2.5/site-packages/twisted/internet/gtk2reactor.py", line 207, in callback

    self.simulate() # fire Twisted timers

  File "/usr/lib/python2.5/site-packages/twisted/internet/gtk2reactor.py", line 216, in simulate

    self.runUntilCurrent()

--- <exception caught here> ---

  File "/usr/lib/python2.5/site-packages/twisted/internet/base.py", line 561, in runUntilCurrent

    call.func(*call.args, **call.kw)

  File "/usr/lib/python2.5/site-packages/twisted/internet/tcp.py", line 553, in doConnect

    self.failIfNotConnected(error.getConnectError((connectResult, os.strerror(connectResult))))

  File "/usr/lib/python2.5/site-packages/twisted/internet/tcp.py", line 479, in failIfNotConnected

    self.connector.connectionFailed(failure.Failure(err))

exceptions.AttributeError: CallbackConnector instance has no attribute 'connectionFailed'

Steps to reproduce:

1. Be sure to have no lircd process running on the machine
2. Start Elisa

Expected result: the LIRC plugin fails to load and doesn't raise an AttributeError
Current result: the LIRC plugin fails to load and raises an AttributeError as show above.