Make redbean StoreAsset() work better

- Better UBSAN error messages
- POSIX Advisory Locks polyfills
- Move redbean manual to /.help.txt
- System call memory safety in ASAN mode
- Character classification now does UNICODE

third_party/zlib/internal.h

@@ -18,7 +18,7 @@ void crc_fold_copy(struct DeflateState *const, unsigned char *,
                    const unsigned char *, long) hidden;
 unsigned crc_fold_512to32(struct DeflateState *const) hidden;
 void fill_window_sse(struct DeflateState *) hidden;
-void *zcalloc(void *, unsigned, unsigned) hidden;
+void *zcalloc(void *, uInt, uInt) hidden;
 void zcfree(void *, void *) hidden;
 
 COSMOPOLITAN_C_END_

third_party/zlib/zalloc.c

@@ -20,7 +20,7 @@
 #include "libc/mem/mem.h"
 #include "third_party/zlib/zutil.internal.h"
 
-void *zcalloc(void *opaque, unsigned items, unsigned size) {
+void *zcalloc(void *opaque, uInt items, uInt size) {
   return weaken(malloc)(items * size);
 }
 

third_party/zlib/zconf.h

@@ -5,12 +5,12 @@
 #define STDC99
 #define MAX_MEM_LEVEL 9
 #define DEF_MEM_LEVEL 8
-#define MAX_WBITS 15 /* 32K LZ77 window */
+#define MAX_WBITS     15 /* 32K LZ77 window */
 
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 
 typedef unsigned char Byte;
-typedef unsigned int uInt;   /* 16 bits or more */
+typedef unsigned long uInt;  /* 16 bits or more */
 typedef unsigned long uLong; /* 32 bits or more */
 typedef Byte Bytef;
 typedef char charf;