Get Cosmopolitan into releasable state

A new rollup tool now exists for flattening out the headers in a way
that works better for our purposes than cpp. A lot of the API clutter
has been removed. APIs that aren't a sure thing in terms of general
recommendation are now marked internal.

There's now a smoke test for the amalgamation archive and gigantic
header file. So we can now guarantee you can use this project on the
easiest difficulty setting without the gigantic repository.

A website is being created, which is currently a work in progress:
https://justine.storage.googleapis.com/cosmopolitan/index.html

libc/str/tinystrstr.internal.h

@@ -0,0 +1,26 @@
+#ifndef COSMOPOLITAN_LIBC_STR_TINYSTRSTR_H_
+#define COSMOPOLITAN_LIBC_STR_TINYSTRSTR_H_
+#include "libc/str/str.h"
+#if !(__ASSEMBLER__ + __LINKER__ + 0)
+
+#define tinystrstr(HAYSTACK, NEEDLE)          \
+  ({                                          \
+    autotype(HAYSTACK) Haystack = (HAYSTACK); \
+    typeof(Haystack) Needle = (NEEDLE);       \
+    for (;;) {                                \
+      size_t i = 0;                           \
+      for (;;) {                              \
+        if (!Needle[i]) goto Found;           \
+        if (!Haystack[i]) break;              \
+        if (Needle[i] != Haystack[i]) break;  \
+        ++i;                                  \
+      }                                       \
+      if (!*Haystack++) break;                \
+    }                                         \
+    Haystack = NULL;                          \
+  Found:                                      \
+    Haystack;                                 \
+  })
+
+#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
+#endif /* COSMOPOLITAN_LIBC_STR_TINYSTRSTR_H_ */