Change all SMARTLIST_FOREACH loops of >=10 lines to use BEGIN/END

The SMARTLIST_FOREACH macro is more convenient than BEGIN/END when
you have a nice short loop body, but using it for long bodies makes
your preprocessor tell the compiler that all the code is on the same
line.  That causes grief, since compiler warnings and debugger lines
will all refer to that one line.

So, here's a new style rule: SMARTLIST_FOREACH blocks need to be
short.

src/test/test.c

@@ -131,8 +131,7 @@ rm_rf(const char *dir)
 
   elements = tor_listdir(dir);
   if (elements) {
-    SMARTLIST_FOREACH(elements, const char *, cp,
-       {
+    SMARTLIST_FOREACH_BEGIN(elements, const char *, cp) {
          char *tmp = NULL;
          tor_asprintf(&tmp, "%s"PATH_SEPARATOR"%s", dir, cp);
          if (0 == stat(tmp,&st) && (st.st_mode & S_IFDIR)) {
@@ -143,7 +142,7 @@ rm_rf(const char *dir)
            }
          }
          tor_free(tmp);
-       });
+    } SMARTLIST_FOREACH_END(cp);
     SMARTLIST_FOREACH(elements, char *, cp, tor_free(cp));
     smartlist_free(elements);
   }

src/test/test_util.c

@@ -2604,8 +2604,7 @@ test_util_split_lines(void *ptr)
     j = 0;
     log_info(LD_GENERAL, "Splitting test %d of length %d",
              i, tests[i].orig_length);
-    SMARTLIST_FOREACH(sl, const char *, line,
-    {
+    SMARTLIST_FOREACH_BEGIN(sl, const char *, line) {
       /* Check we have not got too many lines */
       test_assert(j < MAX_SPLIT_LINE_COUNT);
       /* Check that there actually should be a line here */
@@ -2615,7 +2614,7 @@ test_util_split_lines(void *ptr)
       /* Check that the line is as expected */
       test_streq(line, tests[i].split_line[j]);
       j++;
-    });
+    } SMARTLIST_FOREACH_END(line);
     /* Check that we didn't miss some lines */
     test_eq_ptr(NULL, tests[i].split_line[j]);
     tor_free(orig_line);