Only send EOF to known shells

The only processes that are "safe" or require us to send an EOF to
terminate cleanly are shells, so verify that people didn't run with -e
tmux or similar.

REVIEW: 128791
BUG: 367746
(cherry picked from commit ce4ab92249)

src/Session.cpp

@@ -822,8 +822,10 @@ bool Session::closeInNormalWay()
         return true;
     }
 
-    // Check if the default shell is running, in that case try sending an EOF for a clean exit
-    if (!isForegroundProcessActive()) {
+    static QSet<QString> knownShells({"ash", "bash", "csh", "dash", "fish", "hush", "ksh", "mksh", "pdksh", "tcsh", "zsh"});
+
+    // If only the session's shell is running, try sending an EOF for a clean exit
+    if (!isForegroundProcessActive() && knownShells.contains(QFileInfo(_program).fileName())) {
         _shellProcess->sendEof();
 
         if (_shellProcess->waitForFinished(1000)) {