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/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;