hush: fix a bunch of obscure while/until/continue bugs

function                                             old     new   delta
run_list                                            1159    1214     +55
done_pipe                                            106     123     +17
done_command                                          86      98     +12
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 84/0)               Total: 84 bytes

shell/hush_test/hush-misc/continue2.right

@@ -0,0 +1 @@
+Ok:1

shell/hush_test/hush-misc/continue2.tests

@@ -0,0 +1,3 @@
+e=''
+(while test $e && exit 1; true; do e=1; continue; done)
+echo Ok:$?

shell/hush_test/hush-misc/continue3.right

@@ -0,0 +1,2 @@
+0
+0

shell/hush_test/hush-misc/continue3.tests

@@ -0,0 +1,3 @@
+# Test that "continue" does affect exitcode (sets to 0)
+e=''
+while echo $?; test $e && exit; true; do e=1; false; continue; done

shell/hush_test/hush-misc/until1.right

@@ -0,0 +1,3 @@
+1
+1
+Ok:0

shell/hush_test/hush-misc/until1.tests

@@ -0,0 +1,11 @@
+x=1
+until test "$x" = 4; do echo $x; x=4; done
+
+# We had a bug in multi-line form
+x=1
+until test "$x" = 4; do
+        echo $x
+        x=4
+done
+
+echo Ok:$?

shell/hush_test/hush-misc/while2.right

@@ -0,0 +1,2 @@
+Hello
+OK:0

shell/hush_test/hush-misc/while2.tests

@@ -0,0 +1,2 @@
+while echo Hello; false; do echo NOT SHOWN; done
+echo OK:$?

shell/hush_test/run-all

@@ -46,7 +46,7 @@ do_test()
 	test -x "$x" || continue
 	name="${x%%.tests}"
 	test -f "$name.right" || continue
-#	echo Running test: "$name.right"
+#	echo Running test: "$x"
 	{
 	    "$THIS_SH" "./$x" >"$name.xx" 2>&1
 	    diff -u "$name.xx" "$name.right" >"../$1-$x.fail" && rm -f "$name.xx" "../$1-$x.fail"