Changes in v2:
  - Create a new function to clear \r\n and write to syslog
  - Remove tmp buffer

Introduce a new option (-s/--syslog) to make xenconsoled log into syslog.
The default behaviour remains the same (log into plain files)

From: Eric Chanudet <eric.chanudet@citrix.com>
Signed-off-by: Jean Guyader <jean.guyader@gmail.com>