Add some missing functions to the documentation

functions:
- GetHttpReason
- IsHiddenPath
- IsAcceptablePath
- IsReasonablePath
- ProgramTimeout

also fixed another typo

tool/net/help.txt

@@ -1159,6 +1159,10 @@ FUNCTIONS
           HTTP/0.9, 10 for HTTP/1.0, or 11 for HTTP/1.1.
           Also available as GetVersion (deprecated).
 
+  GetHttpReason(code:int) → str
+          Returns a string describing the HTTP reason phrase.
+          See gethttpreason.c
+
   GetRandomBytes([length:int]) → str
           Returns string with the specified number of random bytes (1..256).
           If no length is specified, then a string of length 16 is returned.
@@ -1181,6 +1185,9 @@ FUNCTIONS
           Programs redbean / listing page to not display any paths beginning
           with prefix. This function should only be called from /.init.lua.
 
+  IsHiddenPath(path:str) → bool
+          Returns true if the prefix of the given path is set with HidePath.
+
   IsPublicIp(uint32) → bool
           Returns true if IP address is not a private network (10.0.0.0/8,
           172.16.0.0/12, 192.168.0.0/16) and is not localhost (127.0.0.0/8).
@@ -1256,6 +1263,14 @@ FUNCTIONS
           like data:opaque, better in fact than most things which claim to
           be URI parsers.
 
+  IsAcceptablePath(str) → bool
+          Returns true if path doesn't contain ".", ".." or "//" segments
+          See isacceptablepath.c
+
+  IsReasonablePath(str) → bool
+          Returns true if path doesn't contain "." or ".." segments.
+          See isreasonablepath.c
+
   EncodeUrl(URL) → str
           This function is the inverse of ParseUrl. The output will always
           be correctly formatted. The exception is if illegal characters are
@@ -1314,6 +1329,11 @@ FUNCTIONS
           as Content-Range and Date, which are abstracted by the transport
           layer.
 
+  ProgramTimeout(milliseconds:int|seconds:int)
+          Default timeout is 60000ms. Minimal value of timeout is 10(ms).
+          Negative values (<0) sets the keepalive in seconds.
+          This should only be called from /.init.lua.
+
   ProgramPort(uint16)
           Hard-codes the port number on which to listen, which can be any
           number in the range 1..65535, or alternatively 0 to ask the
@@ -1325,7 +1345,7 @@ FUNCTIONS
           default is very conservatively set to 65536 so this is
           something many people will want to increase. This limit is
           enforced at the transport layer, before any Lua code is
-          called, because right now redbean stores and forewards
+          called, because right now redbean stores and forwards
           messages. (Use the UNIX API for raw socket streaming.) Setting
           this to a very high value can be useful if you're less
           concerned about rogue clients and would rather have your Lua