Redbean doc update (#221)

- Update redbean documentation for consistency and fix typo (#97)
- Update redbean constants for consistency
- Add Fetch documentation to redbean (#97)

tool/net/help.txt

@@ -533,6 +533,14 @@ FUNCTIONS
    EscapeUser(str) → str
            Escapes URL username. See kescapeauthority.c.
 
+   Fetch(url:str[,body:str|{method=value:str,body=value:str}])
+       → status:int,{header:str=value:str,...},body:str
+           Sends an HTTP/HTTPS request to the specified URL. If only the URL is
+           provided, then a GET request is sent. If both URL and body parameters
+           are specified, then a POST request is sent. If any other method needs
+           to be specified (for example, PUT or DELETE), then passing a table as
+           the second value allows setting method and body values.
+
    FormatHttpDateTime(seconds:int) → rfc1123:str
            Converts UNIX timestamp to an RFC1123 string that looks like this:
            Mon, 29 Mar 2021 15:37:13 GMT. See formathttpdatetime.c.
@@ -591,7 +599,7 @@ FUNCTIONS
            message, then this function will fold those multiple entries into
            a single string.
 
-   GetHeaders() → {name:str = value:str, ...}
+   GetHeaders() → {name:str=value:str,...}
            Returns HTTP headers as dictionary mapping header key strings to
            their UTF-8 decoded values. The ordering of headers from the
            request message is not preserved. Whether or not the same key can
@@ -625,7 +633,7 @@ FUNCTIONS
            Anything else that the RFC classifies as a "token" string is
            accepted too, which might contain characters like &".
 
-   GetParams() → {{name:str[, value:str]}, ...}
+   GetParams() → {{name:str[,value:str]},...}
            Returns name=value parameters from Request-URL and
            application/x-www-form-urlencoded message body in the order they
            were received. This may contain duplicates. The inner array will
@@ -673,7 +681,7 @@ FUNCTIONS
            minor (mm), and patch (pp) versions encoded. The version value 1.4
            would be represented as 0x010400.
 
-   GetZipPaths() → array[str]
+   GetZipPaths() → {path:str,...}
            Returns paths of all assets in the zip central directory, prefixed
            by a slash.
 
@@ -866,7 +874,7 @@ FUNCTIONS
 
    Sleep(seconds:number)
            Sleeps the specified number of seconds (can be fractional). The
-           smallest interval is a millisecond.
+           smallest interval is a microsecond.
 
    Route([host:str,[path:str]])
            Instructs redbean to follow the normal HTTP serving path. This

tool/net/redbean.c

@@ -1172,8 +1172,8 @@ static void AppendResourceReport(struct rusage *ru, const char *nl) {
   if (ru->ru_maxrss) {
     Append("ballooned to %,ldkb in size%s", ru->ru_maxrss, nl);
   }
-  if ((utime = ru->ru_utime.tv_sec * 1000000 + ru->ru_utime.tv_usec) |
+  if ((utime = ru->ru_utime.tv_sec * 1e6 + ru->ru_utime.tv_usec) |
-      (stime = ru->ru_stime.tv_sec * 1000000 + ru->ru_stime.tv_usec)) {
+      (stime = ru->ru_stime.tv_sec * 1e6 + ru->ru_stime.tv_usec)) {
     ticks = ceill((long double)(utime + stime) / (1000000.L / CLK_TCK));
     Append("needed %,ldµs cpu (%d%% kernel)%s", utime + stime,
            (int)((long double)stime / (utime + stime) * 100), nl);
@@ -1223,8 +1223,8 @@ static void AppendResourceReport(struct rusage *ru, const char *nl) {
 static void AddTimeval(struct timeval *x, const struct timeval *y) {
   x->tv_sec += y->tv_sec;
   x->tv_usec += y->tv_usec;
-  if (x->tv_usec >= 1000000) {
+  if (x->tv_usec >= 1e6) {
-    x->tv_usec -= 1000000;
+    x->tv_usec -= 1e6;
     x->tv_sec += 1;
   }
 }
@@ -4886,7 +4886,7 @@ static int LuaLog(lua_State *L) {
 }
 
 static int LuaSleep(lua_State *L) {
-  usleep(1000000 * luaL_checknumber(L, 1));
+  usleep(1e6 * luaL_checknumber(L, 1));
   return 0;
 }