Updated s_reach_target to MCStringRef
Fixed compilation errors
Global variable init/finalization better handled
Merge branch 'refactor-syntax_unicode' into refactor-syntax_unicode_iphone_reachability
Iphone reachability functions: update to MCStringRef
Cast added to comply with the release method expected by SCNetworkReachabilitySetCallback
Merge branch 'refactor-syntax_unicode_iphone_reachability' into refactor-syntax_unicode