Add comments about utempter being disabled.

svn path=/trunk/KDE/kdebase/apps/konsole/; revision=733675

src/Session.cpp

@@ -70,7 +70,11 @@ Session::Session() :
    , _autoClose(true)
    , _wantedClose(false)
    , _silenceSeconds(10)
-   , _addToUtmp(false)
+   , _addToUtmp(false)  // disabled by default because of a bug encountered on certain systems
+                        // which caused Konsole to hang when closing a tab and then opening a new
+                        // one.  A 'QProcess destroyed while still running' warning was being
+                        // printed to the terminal.  Likely a problem in KPty::logout() 
+                        // or KPty::login() which uses a QProcess to start /usr/bin/utempter 
    , _flowControl(true)
    , _fullScripting(false)
    , _sessionId(0)