Fix bugs and make improvements

- Fix regression with `%lu`
- Added some more headers witnessed in the wild
- Added `-M INT` option to redbean to tune max payload size
- Work around InfoZIP 256 character limit on comment line size

test/libc/stdio/popen_test.c

@@ -23,6 +23,7 @@
 TEST(popen, test) {
   int ws;
   FILE *f;
+  /* TODO(jart): look into popen() asan error */
   f = popen("echo hi", "r");
   ASSERT_NE(NULL, f);
   EXPECT_EQ('h', fgetc(f));