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/dns/gethoststxt.c

@@ -37,7 +37,7 @@ static struct HostsTxtInitialStaticMemory {
 } g_hoststxt_init;
 
 static textwindows dontinline char *GetNtHostsTxtPath(char *pathbuf,
-                                                    uint32_t size) {
+                                                      uint32_t size) {
   const char *const kWinHostsPath = "\\drivers\\etc\\hosts";
   uint32_t len = GetSystemDirectoryA(&pathbuf[0], size);
   if (len && len + strlen(kWinHostsPath) + 1 < size) {
@@ -57,7 +57,7 @@ static textwindows dontinline char *GetNtHostsTxtPath(char *pathbuf,
 const struct HostsTxt *GetHostsTxt(void) {
   FILE *f;
   const char *path;
-  char pathbuf[PATH_MAX];
+  char pathbuf[PATH_MAX + 1];
   struct HostsTxtInitialStaticMemory *init;
   init = &g_hoststxt_init;
   if (!g_hoststxt) {

libc/dns/lookupprotobyname.c

@@ -48,10 +48,10 @@ int LookupProtoByName(const char *protoname, char *buf, size_t bufsize,
                       const char *filepath) {
   FILE *f;
   char *line;
-  char pathbuf[PATH_MAX];
   const char *path;
   size_t linesize;
   int found, result;
+  char pathbuf[PATH_MAX + 1];
   char *name, *number, *alias, *comment, *tok;
   if (!(path = filepath)) {
     path = "/etc/protocols";

libc/dns/lookupprotobynumber.c

@@ -52,10 +52,10 @@ int LookupProtoByNumber(const int protonum, char *buf, size_t bufsize,
                         const char *filepath) {
   FILE *f;
   char *line;
-  char pathbuf[PATH_MAX];
-  const char *path;
-  size_t linesize;
   int found;
+  size_t linesize;
+  const char *path;
+  char pathbuf[PATH_MAX + 1];
   char *name, *number, *comment, *tok;
   if (!(path = filepath)) {
     path = "/etc/protocols";

libc/dns/lookupservicesbyname.c

@@ -53,10 +53,10 @@ int LookupServicesByName(const char *servname, char *servproto,
                          const char *filepath) {
   FILE *f;
   char *line;
-  char pathbuf[PATH_MAX];
   const char *path;
   size_t linesize;
   int found, result;
+  char pathbuf[PATH_MAX + 1];
   char *name, *port, *proto, *alias, *comment, *tok;
   if (!(path = filepath)) {
     path = "/etc/services";

libc/dns/lookupservicesbyport.c

@@ -59,7 +59,7 @@ int LookupServicesByPort(const int servport, char *servproto,
                          const char *filepath) {
   FILE *f;
   char *line;
-  char pathbuf[PATH_MAX];
+  char pathbuf[PATH_MAX + 1];
   const char *path;
   size_t linesize;
   int found;