luasocket/TODO

* should be interrupt-safe
* notice the change in callback conventions
* new mime module replacing old code module (faster, more functionality)
* new socket options (many)
* only allocate in case of success
* optimize for success (only call select if fails) 
* add proxy support to http
* add gethostname 
* local connect 
* connect with timeout
* change code to mime
* change stay to redirect 
* add shutdown
* change send/recv to avoid using select
* O location do "redirect" pode ser relativo ao servidor atual (n<>o pode,
  mas os servidores fazem merda...)
* Ajeitar para Lua 5.0
* Padronizar os retornos de funccao
* Separar as classes em arquivos
* Retorno de sendto em datagram sockets pode ser refused

colocar um userdata com gc metamethod pra chamar sock_close (WSAClose);
sources ans sinks are always simple in http and ftp and smtp
unify backbone of smtp and ftp
expose encode/decode tables to provide extensibility for mime module
use coroutines instead of fancy filters
unify filter and send/receive callback. new sink/source/pump idea.
get rid of aux_optlstring
wrap sink and sources with a function that performs the replacement
get rid of unpack in mime.lua

check garbage collection in test*.lua
pop3???

break chain into a simpler binary chain and a complex (recursive) one. 

add socket.TIMEOUT to be default timeout? 

manual
    add socket.connect and socket.bind to the manual
    say what a nil callback does for http
    check all occurences of it's
    - add shutdown
    - add gethostname
    the need of a content-length header in the post method...
    notice the change in callback conventions
    the callback.lua module and the new mime module.
    escape and unescape in url, not in code!
    add timeout and proxy to request table
    change stay to redirect 
    socket.time and socket.sleep
    - connect with timeout
    local connect 
    add thanks to 'carlos cassino' and 'david burgess'
    add new ip- options and reuseaddr option
    - add listen to manual
    bind method doesn't do listen anymore
    bind doesn't turn an object into a server object: listen does.

tests
    checar todos os metodos
    checar todas as globais
    checar garbage collection
    check for interrupts

wrp can't break lines in the middle of a line break.
call select before accept, not after, dumbass!
get rid of setnonblocking/setblocking in the bind function
close has to block...
fmt is not a good name
change wrap() to accept a number and default to "character"
move gethostname to dns table
get rid of _cb in name of functions? 
trust character constants in mime.c? noooooo.
smtp.lua needs stuff filter

add comments into each C module.
new option.c module to put all options (TCP and UDP share...)?
testar os options!
add _tostring methods!
change all modules to use the new namespace scheme

write some utilities that use the code.lua module and put them 
in etc, modify the README.etc file and makefile.dist (eol.lua is done)

use gethostname it in SMTP

make sure modules know if their dependencies are there.

Read about
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-AUTH GSSAPI
250-DELIVERBY
250 HELP

Change return of send and receive callbacks to allow for 
new functions. "" signals end of transmission. Pass total 
number of bytes in request table for HTTP. Callback has nothing
to do with it.

Make sure nobody can fuck up with the metatables...

Create a passive mode option for the FTP (good for firewall).

Modules should return their namespace table in the end of the chunk.

Adjust dates in all files

Test the library on every system possible

Add service name translation.
Ajeitar o protocolo da luaopen_socket()... sei l<> qual <20>.


- adicionar exemplos de expans<6E>o: pipe, local, named pipe


- Fazer compilar com g++
- Thread-safe
  - proteger get*by*.* com um mutex GLOBAL!
  - proteger ou atomizar o conjunto (timedout, receive), (timedout, send)
  - inet_ntoa tamb<6D>m <20> uma merda.
- SSL

- unix 92 bytes maximo no endere<72>o, incluindo o zero
- unix 9216 maximo de datagram size