hush: fix escaping of \[*?; add testsuites for these and for globbing

shell/hush.c

@@ -3638,7 +3638,6 @@ static int parse_stream(o_string *dest, struct p_context *ctx,
 				debug_printf_parse("parse_stream return 1: \\<eof>\n");
 				return 1;
 			}
-			o_addqchr(dest, '\\', dest->o_quote);
 			o_addqchr(dest, i_getch(input), dest->o_quote);
 			break;
 		case '$':
@@ -3653,7 +3652,7 @@ static int parse_stream(o_string *dest, struct p_context *ctx,
 				ch = i_getch(input);
 				if (ch == EOF || ch == '\'')
 					break;
-				o_addchr(dest, ch);
+				o_addqchr(dest, ch, 1);
 			}
 			if (ch == EOF) {
 				syntax("unterminated '");

shell/hush_test/hush-glob/glob1.right

@@ -0,0 +1,2 @@
+glob1.tests
+glob1.tests

shell/hush_test/hush-glob/glob1.tests

@@ -0,0 +1,2 @@
+echo *glob1?t[e]sts*
+echo "glob1"?'t'[e]s*

shell/hush_test/hush-parsing/escape1.right

@@ -0,0 +1,4 @@
+\
+a\b
+\\
+c\\d

shell/hush_test/hush-parsing/escape1.tests

@@ -0,0 +1,4 @@
+echo "\\"
+echo a"\\"b
+echo '\\'
+echo c'\\'d

shell/hush_test/hush-parsing/escape2.right

@@ -0,0 +1,4 @@
+*?[a]*
+a*?[a]*b
+*?[a]*
+c*?[a]*d

shell/hush_test/hush-parsing/escape2.tests

@@ -0,0 +1,4 @@
+echo "*?[a]*"
+echo a"*?[a]*"b
+echo '*?[a]*'
+echo c'*?[a]*'d