Make improvements

- Expand redbean UNIX module
- Expand redbean documentation
- Ensure Lua copyright is embedded in binary
- Increase the PATH_MAX limit especially on NT
- Use column major sorting for linenoise completions
- Fix some suboptimalities in redbean's new UNIX API
- Figured out right flags for Multics newline in raw mode

libc/runtime/winmain.greg.c

@@ -55,6 +55,7 @@
 #include "libc/runtime/memtrack.internal.h"
 #include "libc/runtime/runtime.h"
 #include "libc/sock/internal.h"
+#include "libc/str/str.h"
 #include "libc/str/tpenc.h"
 #include "libc/str/utf16.h"
 
@@ -120,6 +121,15 @@ forceinline void MakeLongDoubleLongAgain(void) {
   asm volatile("fldcw\t%0" : /* no outputs */ : "m"(x87cw));
 }
 
+static inline size_t StrLen16(const char16_t *s) {
+  size_t n;
+  for (n = 0;; ++n) {
+    if (!s[n]) {
+      return n;
+    }
+  }
+}
+
 __msabi static textwindows int OnEarlyWinCrash(struct NtExceptionPointers *ep) {
   uint32_t wrote;
   char buf[64], *p = buf;
@@ -209,6 +219,9 @@ __msabi static textwindows wontreturn void WinMainNew(const char16_t *cmdline) {
     }
   }
   env16 = GetEnvironmentStrings();
+  for (char16_t *e = env16; *e; e += StrLen16(e) + 1) {
+    NTTRACE("GetEnvironmentStrings() → %!#hs", e);
+  }
   NTTRACE("WinMainNew() loading environment");
   GetDosEnviron(env16, wa->envblock, ARRAYLEN(wa->envblock) - 8, wa->envp,
                 ARRAYLEN(wa->envp) - 1);
@@ -257,7 +270,6 @@ __msabi textwindows int64_t WinMain(int64_t hInstance, int64_t hPrevInstance,
   extern uint64_t ts asm("kStartTsc");
   os = WINDOWS; /* madness https://news.ycombinator.com/item?id=21019722 */
   ts = rdtsc();
-  __nomultics = true;
   __pid = GetCurrentProcessId();
   __wincrashearly = AddVectoredExceptionHandler(1, (void *)OnEarlyWinCrash);
   cmdline = GetCommandLine();