Make fixes and improvements

- Invent iso8601us() for faster timestamps
- Improve --strace descriptions of sigset_t
- Rebuild the Landlock Make bootstrap binary
- Introduce MODE=sysv for non-Windows builds
- Permit OFD fcntl() locks under pledge(flock)
- redbean can now protect your kernel from ddos
- Have vfork() fallback to sys_fork() not fork()
- Change kmalloc() to not die when out of memory
- Improve documentation for some termios functions
- Rewrite putenv() and friends to conform to POSIX
- Fix linenoise + strace verbosity issue on Windows
- Fix regressions in our ability to show backtraces
- Change redbean SetHeader() to no-op if value is nil
- Improve fcntl() so SQLite locks work in non-WAL mode
- Remove some unnecessary work during fork() on Windows
- Create redbean-based SSL reverse proxy for IPv4 TurfWar
- Fix ape/apeinstall.sh warning when using non-bash shells
- Add ProgramTrustedIp(), and IsTrustedIp() APIs to redbean
- Support $PWD, $UID, $GID, and $EUID in command interpreter
- Introduce experimental JTqFpD APE prefix for non-Windows builds
- Invent blackhole daemon for firewalling IP addresses via UNIX named socket
- Add ProgramTokenBucket(), AcquireToken(), and CountTokens() APIs to redbean

net/http/http.h

@@ -214,6 +214,7 @@ int ParseForwarded(const char *, size_t, uint32_t *, uint16_t *);
 bool IsMimeType(const char *, size_t, const char *);
 ssize_t Unchunk(struct HttpUnchunker *, char *, size_t, size_t *);
 const char *FindContentType(const char *, size_t);
+bool IsNoCompressExt(const char *, size_t);
 char *FoldHeader(struct HttpMessage *, char *, int, size_t *);
 
 COSMOPOLITAN_C_END_

net/http/http.mk

@@ -57,6 +57,8 @@ o/$(MODE)/net/http/istestnetip.o: private	\
 		OVERRIDE_CFLAGS +=		\
 			-Os
 
+# we need -O3 because:
+#   we're dividing by constants
 o/$(MODE)/net/http/formathttpdatetime.o: private\
 		OVERRIDE_CFLAGS +=		\
 			-O3

net/http/isnocompressext.c

@@ -0,0 +1,73 @@
+/*-*- 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 2022 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/intrin/bits.h"
+#include "libc/intrin/bswap.h"
+#include "libc/macros.internal.h"
+#include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
+#include "net/http/http.h"
+
+static const char kNoCompressExts[][8] = {
+    "bz2",   //
+    "gif",   //
+    "gz",    //
+    "jpg",   //
+    "lz4",   //
+    "mp4",   //
+    "mpeg",  //
+    "mpg",   //
+    "png",   //
+    "webp",  //
+    "xz",    //
+    "zip",   //
+};
+
+static bool BisectNoCompressExts(uint64_t ext) {
+  int c, m, l, r;
+  l = 0;
+  r = ARRAYLEN(kNoCompressExts) - 1;
+  while (l <= r) {
+    m = (l + r) >> 1;
+    if (READ64BE(kNoCompressExts[m]) < ext) {
+      l = m + 1;
+    } else if (READ64BE(kNoCompressExts[m]) > ext) {
+      r = m - 1;
+    } else {
+      return true;
+    }
+  }
+  return false;
+}
+
+bool IsNoCompressExt(const char *p, size_t n) {
+  int c, i;
+  uint64_t w;
+  if (n == -1) n = p ? strlen(p) : 0;
+  if (n) {
+    for (i = w = 0; n--;) {
+      c = p[n] & 255;
+      if (c == '.') break;
+      if (++i > 8) return false;
+      w <<= 8;
+      w |= kToLower[c];
+    }
+    return BisectNoCompressExts(bswap_64(w));
+  }
+  return false;
+}