Windows Live Messenger is still in use in china which accounts for ~20% of world
population. Revert WLM dropping which has been merged under the assumption that
WLM data and features are completely useless.
This commit reverts commits
- 460470229d
- 9affd6f7e7
which have been merged by d59431691c.
PHPBB3-11201
WLM will be shutdown in March 2013. Skype is the new replacement. But as Skype
uses a different login ID and service, the values in this field are useless.
So we can safely remove the field and the links/functions we create.
PHPBB3-11201
