Initial conversion to raw socket approach for tcp pings.
Added a comment for Socket.getaddrinfo.
Set bool to true if IO.select response is not nil.
Remove unused variable.
Added changes for 1.6.3.
Version bumps.
Removed LDAP references and other minor updates.
Changed release to 1.7.0 and added more changes.
Version bump and set required Ruby version to 1.9.1 or later.
Version bump.