hush: tighten up "for" variable name check.

Add TODOs.
 Disable redir4.right part where we differ from bash.
 It is not a bug per standards.
 Add a few tests, one is in hush-bugs section:
 and_or_and_backgrounding.right. It will likely bite users
 in real world usage.

shell/hush_test/hush-bugs/and_or_and_backgrounding.right

@@ -0,0 +1,4 @@
+First
+Second
+Third
+Done

shell/hush_test/hush-bugs/and_or_and_backgrounding.tests

@@ -0,0 +1,31 @@
+# UNFIXED BUG: hush thinks that ; && || & have the same precedence.
+# According to this doc, && || have higher precedence than ; &.
+# See example below.
+# Precedence of ; is not a problem in practice. Precedence of & is.
+#
+#http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html
+#
+#2.9.3 Lists
+#
+#An AND-OR list is a sequence of one or more pipelines separated by
+#the operators "&&" and "||" .
+#
+#A list is a sequence of one or more AND-OR lists separated by the operators
+#';' and '&' and optionally terminated by ';', '&', or <newline>.
+#
+#The operators "&&" and "||" shall have equal precedence and shall be
+#evaluated with left associativity. For example, both of the following
+#commands write solely bar to standard output:
+#
+#    false && echo foo || echo bar
+#    true || echo foo && echo bar
+#
+#A ';' or <newline> terminator shall cause the preceding AND-OR list
+#to be executed sequentially; an '&' shall cause asynchronous execution
+#of the preceding AND-OR list.
+
+echo First && sleep 0.2 && echo Third &
+sleep 0.1
+echo Second
+wait
+echo Done

shell/hush_test/hush-misc/for_with_bslashes.right

@@ -0,0 +1,8 @@
+a
+b\c
+b\\c
+b"c
+b'c
+b$c
+b`true`c
+Zero:0

shell/hush_test/hush-misc/for_with_bslashes.tests

@@ -0,0 +1,10 @@
+# UNFIXED BUG.
+# commented-out words contain ^C character.
+# It's a SPECIAL_VAR_SYMBOL, for now hush does not escape it.
+# When it is fixed, update this test.
+
+for a in 'a' 'b\c' 'b\\c' 'b"c' "b'c" 'b$c' 'b`true`c' ### 'b#c'
+do
+    echo $a
+done
+echo Zero:$?

shell/hush_test/hush-misc/redir1.tests

@@ -27,7 +27,7 @@ var=ok
 { var=bad >shell_test_$$; } &
 # cant use usleep as it isnt standard in $PATH --
 # we fail when testing busybox compiled solely as "hush"
-sleep 1
+wait
 echo "Test 4:  var:$var"
 test -f shell_test_$$ && echo "File created:ok"
 

shell/hush_test/hush-misc/redir4.right

@@ -10,16 +10,9 @@ Here3
 Ok3
 Here4
 Ok4
-How with variable refs
+Now with variable refs
 shell_test_1
 \shell_test_1
 \shell_test_1
 \shell_test_1
-Here1
-Ok1
-Here2
-Ok2
-Here3
-Ok3
-Here4
-Ok4
+Done

shell/hush_test/hush-misc/redir4.tests

@@ -38,7 +38,7 @@ Here4
 echo Ok4
 
 
-echo How with variable refs
+echo Now with variable refs
 i=1
 
 
@@ -58,6 +58,11 @@ rm *shell_test*
 echo *shell_test*
 rm *shell_test*
 
+echo Done;exit
+# UNFIXED BUG. bash apparently will expand $i even in terminating delimiter.
+# http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html
+# does not mandate this behavior.
+# This is not likely to be used much in real-world.
 
 cat <<\shell_test_$i
 Here1

shell/hush_test/hush-vars/param_subshell.tests

@@ -7,9 +7,9 @@ echo 1=$1
 { echo 3=$3; } &
 # cant use usleep as it isnt standard in $PATH --
 # we fail when testing busybox compiled solely as "hush"
-sleep 1
+wait
 ( echo 4=$4 )
 ( echo 5=$5 ) &
-sleep 1
+wait
 true | echo 6=$6 | cat
 true | { echo 7=$7; } | cat