Make major improvements to redbean

- lua server pages
- lua http library
- http v0.9 support
- request uri parsing
- fork failure recovery
- accelerated redirects
- http pipelining support
- lenient message framing
- html / uri / js escaping
- fix shutdown signal handling

test/net/http/escapehtml_test.c

@@ -0,0 +1,41 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2021 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/runtime/gc.internal.h"
+#include "libc/testlib/testlib.h"
+#include "net/http/escape.h"
+
+char *escapehtml(const char *s) {
+  struct EscapeResult r;
+  r = EscapeHtml(s, strlen(s));
+  ASSERT_EQ(strlen(r.data), r.size);
+  return r.data;
+}
+
+TEST(escapehtml, test) {
+  EXPECT_STREQ("abc&<>"'\1\2",
+               gc(escapehtml("abc&<>\"'\1\2")));
+}
+
+TEST(escapehtml, testLargeGrowth) {
+  EXPECT_STREQ("&quot;&quot;&quot;", gc(escapehtml("\"\"\"")));
+}
+
+TEST(escapehtml, testEmpty) {
+  EXPECT_STREQ("", gc(escapehtml("")));
+}