Update doc [ci skip]

doc/lcurl.ldoc

@@ -367,6 +367,87 @@ function setopt_progressfunction() end
 --
 function setopt_progressfunction() end
 
+--- Set seek callback function.
+--
+-- A callback accepting two or three parameters.
+-- The first is the seek context if any, the second is the `origin` value
+-- same as in file.seek function from io library. Can be (`cur`, `set` and `end`).
+-- The third parameter is offset or position in input stream.
+-- If stream can not be seeking and need stop current transfer operation
+-- function have to raise Lua error or returns `nil` and error message.
+-- To indicate success function have to return any truthy value
+-- In other case Function must return `true` or `1` or nothing to continue operation.
+-- False value indicate that while the seek failed, libcurl is free to work
+-- around the problem if possible.
+--
+-- !!! NOTE !!! This is differents form libcurl API by swapping parameters in callback.
+-- It done to be compatiable with Lua io library.
+--
+-- @tparam function seek
+-- @param[opt] context seek context
+-- @return[1] self
+--
+function setopt_seekfunction() end
+
+--- Set seek callback function.
+--
+-- This call same as easy:setopt_seekfunction(stream.seek, seek)
+--
+-- @tparam object stream
+-- @return[1] self
+--
+function setopt_seekfunction() end
+
+--- Set debug callback function.
+--
+-- A callback accepting two or three parameters.
+-- The first is the debug context if any, the second is the `data_type` value
+-- which represent what kinde of data is passed. This value can be one of 
+-- constant `INFO_TEXT`, `INFO_HEADER_IN`, `INFO_HEADER_OUT`, `INFO_DATA_IN`,
+-- `INFO_DATA_OUT`, `INFO_SSL_DATA_IN`, `INFO_SSL_DATA_OUT`.
+-- The third parameter is data itself.
+-- Any errors and returning values from this callback are ignored.
+--
+-- @tparam function debug
+-- @param[opt] context debug context
+-- @return[1] self
+--
+function setopt_debugfunction() end
+
+--- Set debug callback function.
+--
+-- This call same as easy:setopt_debugfunction(debug.debug, debug)
+--
+-- @tparam object debug
+-- @return[1] self
+--
+function setopt_debugfunction() end
+
+--- Set match callback function.
+--
+-- A callback accepting two or three parameters.
+-- The first is the match context if any, the second is the pattern string,
+-- the third is the string to match to pattern.
+-- Function must return truthy value to indicate that string match to pattern.
+-- If function raise error or return nil and error message then it indicate
+-- that curl should interrupt current transfer operation.
+-- False value indicate that strind does not match to pattern
+--
+-- @tparam function match
+-- @param[opt] context match context
+-- @return[1] self
+--
+function setopt_fnmatch_function() end
+
+--- Set match callback function.
+--
+-- This call same as easy:setopt_fnmatch_function(match.match, match)
+--
+-- @tparam object match
+-- @return[1] self
+--
+function setopt_fnmatch_function() end
+
 --- Set HTTP multipart/formdata.
 --
 -- Caller does not have to save data.