util: omit -l for csh as -l should be the only flag specified to run login shell (IDEA-CR-17716)

platform/util/src/com/intellij/util/EnvironmentUtil.java

@@ -218,7 +218,7 @@ public class EnvironmentUtil {
         throw new Exception("shell:" + shell);
       }
       List<String> commands = ContainerUtil.newArrayList(shell);
-      if (!shell.endsWith("/tcsh")) {
+      if (!shell.endsWith("/tcsh") && !shell.endsWith("/csh")) {
         // Act as a login shell
         // tsch does allow to use -l with any other options
         commands.add("-l");