hush: fix "while false; ..." exitcode; add testsuites

diff --git a/shell/hush_test/hush-misc/break4.right b/shell/hush_test/hush-misc/break4.right
new file mode 100644
index 0000000..6f41c14
--- /dev/null
+++ b/shell/hush_test/hush-misc/break4.right
@@ -0,0 +1,6 @@
+A
+AA
+TRUE
+A
+AA
+OK:0
diff --git a/shell/hush_test/hush-misc/break4.tests b/shell/hush_test/hush-misc/break4.tests
new file mode 100755
index 0000000..67da288
--- /dev/null
+++ b/shell/hush_test/hush-misc/break4.tests
@@ -0,0 +1,12 @@
+cond=true
+while $cond; do
+    echo A
+    if test "$cond" = true; then
+	cond='echo TRUE'
+    else
+	cond=false
+    fi
+    while true; do echo AA; continue 2; echo BB; done
+    echo B
+done
+echo OK:$?
diff --git a/shell/hush_test/hush-misc/while1.right b/shell/hush_test/hush-misc/while1.right
new file mode 100644
index 0000000..7c4d7be
--- /dev/null
+++ b/shell/hush_test/hush-misc/while1.right
@@ -0,0 +1 @@
+OK:0
diff --git a/shell/hush_test/hush-misc/while1.tests b/shell/hush_test/hush-misc/while1.tests
new file mode 100755
index 0000000..11e201e
--- /dev/null
+++ b/shell/hush_test/hush-misc/while1.tests
@@ -0,0 +1,2 @@
+while false; do echo NOT SHOWN; done
+echo OK:$?