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

net/http/decodelatin1.c

@@ -39,7 +39,7 @@ char *DecodeLatin1(const char *p, size_t n, size_t *z) {
   if (n == -1) n = p ? strlen(p) : 0;
   if ((q = r = malloc(n * 2 + 1))) {
     for (i = 0; i < n;) {
-      memset(vz, 0, 16); /* 3x speedup for ASCII */
+      bzero(vz, 16); /* 3x speedup for ASCII */
       while (i + 16 < n) {
         memcpy(v1, p + i, 16);
         pcmpgtb(v2, v1, vz);

net/http/encodelatin1.c

@@ -40,7 +40,7 @@ char *EncodeLatin1(const char *p, size_t n, size_t *z, int f) {
   size_t i;
   char t[256];
   char *r, *q;
-  memset(t, 0, sizeof(t));
+  bzero(t, sizeof(t));
   if (f & kControlC0) memset(t + 0x00, 1, 0x20 - 0x00), t[0x7F] = 1;
   if (f & kControlC1) memset(t + 0x80, 1, 0xA0 - 0x80);
   t['\t'] = t['\r'] = t['\n'] = t['\v'] = !!(f & kControlWs);

net/http/foldheader.c

@@ -21,6 +21,9 @@
 #include "libc/str/str.h"
 #include "net/http/http.h"
 
+/**
+ * Collapses repeating headers onto a single line.
+ */
 char *FoldHeader(struct HttpMessage *msg, char *b, int h, size_t *z) {
   char *p;
   size_t i, n, m;

net/http/hascontrolcodes.c

@@ -34,7 +34,7 @@ ssize_t HasControlCodes(const char *p, size_t n, int f) {
   char t[256];
   wint_t x, a, b;
   size_t i, j, m, g;
-  memset(t, 0, sizeof(t));
+  bzero(t, sizeof(t));
   if (f & kControlC0) memset(t + 0x00, 1, 0x20 - 0x00), t[0x7F] = 1;
   if (f & kControlC1) memset(t + 0x80, 1, 0xA0 - 0x80);
   t['\t'] = t['\r'] = t['\n'] = t['\v'] = !!(f & kControlWs);

net/http/parsehttpmessage.c

@@ -36,7 +36,7 @@
  */
 void InitHttpMessage(struct HttpMessage *r, int type) {
   assert(type == kHttpRequest || type == kHttpResponse);
-  memset(r, 0, sizeof(*r));
+  bzero(r, sizeof(*r));
   r->type = type;
 }
 

net/http/parseurl.c

@@ -257,7 +257,7 @@ static char *ParseUrlImpl(const char *s, size_t n, struct Url *h, bool latin1) {
   u.isform = false;
   u.isopaque = false;
   u.islatin1 = latin1;
-  memset(h, 0, sizeof(*h));
+  bzero(h, sizeof(*h));
   if ((m = malloc(latin1 ? u.n * 2 : u.n))) {
     u.q = u.p = m;
     if (ParseScheme(&u, h)) ParseAuthority(&u, h);

net/http/underlong.c

@@ -46,7 +46,7 @@ char *Underlong(const char *p, size_t n, size_t *z) {
   if (n == -1) n = p ? strlen(p) : 0;
   if ((q = r = malloc(n + 1))) {
     for (i = 0; i < n;) {
-      memset(vz, 0, 16); /* 50x speedup for ASCII */
+      bzero(vz, 16); /* 50x speedup for ASCII */
       while (i + 16 < n) {
         memcpy(v1, p + i, 16);
         pcmpgtb(v2, v1, vz);