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

tool/viz/lib/bilinearscale.c

@@ -93,7 +93,7 @@ void *BilinearScale(long dcw, long dyw, long dxw,
                      gc(xmemalign(64, ROUNDUP(dxn, 64))),
                      gc(xmemalign(64, ROUNDUP(sxn, 64) * 2)));
     } else {
-      memset(dst[c0], 0, &dst[cn][0][0] - &dst[c0][0][0]);
+      bzero(dst[c0], &dst[cn][0][0] - &dst[c0][0][0]);
     }
   }
   return dst;

tool/viz/lib/convolve.h

@@ -19,12 +19,12 @@ forceinline void convolve(unsigned yn, unsigned xn, __m128 img[yn][xn], int KW,
       kflip[KW - i - 1][KW - j - 1] = (__v4sf){f, f, f, f};
     }
   }
-  memset(&g, 0, sizeof(g));
+  bzero(&g, sizeof(g));
   resizegraphic(&g, yn, xn);
   tmp = g.b.p;
   for (y = 0; y < yn - KW; ++y) {
     for (x = 0; x < xn - KW; ++x) {
-      memset(&p, 0, sizeof(p));
+      bzero(&p, sizeof(p));
       for (i = 0; i < KW; ++i) {
         for (j = 0; j < KW; ++j) {
           p += img[y + i][x + j] * kflip[i][j] + C2;

tool/viz/lib/unsharp.c

@@ -45,7 +45,7 @@ long unsharp(long cn, long yw, long xw, unsigned char img[cn][yw][xw], long yn,
           for (x = 0; x < xn; ++x) {
             img[c][y - 3][x] = MIN(255, MAX(0, (*t)[y % 3][x]));
           }
-          memset((*t)[y % 3], 0, sizeof(short) * xn);
+          bzero((*t)[y % 3], sizeof(short) * xn);
         }
         if (y < yn) {
           for (x = 0; x < xn; ++x) {

tool/viz/lib/ycbcr2rgb3.c

@@ -155,8 +155,8 @@ void YCbCrInit(struct YCbCr **ycbcr, bool yonly, int swing, double gamma,
                const double gamut[3], const double illuminant[3]) {
   if (!*ycbcr) *ycbcr = xcalloc(1, sizeof(struct YCbCr));
   (*ycbcr)->yonly = yonly;
-  memset((*ycbcr)->magnums, 0, sizeof((*ycbcr)->magnums));
-  memset((*ycbcr)->lighting, 0, sizeof((*ycbcr)->lighting));
+  bzero((*ycbcr)->magnums, sizeof((*ycbcr)->magnums));
+  bzero((*ycbcr)->lighting, sizeof((*ycbcr)->lighting));
   YCbCrComputeCoefficients(swing, gamma, gamut, illuminant, (*ycbcr)->magnums,
                            (*ycbcr)->lighting, (*ycbcr)->transfer[0]);
   imapxlatab((*ycbcr)->transfer[1]);