mime filters are more strict with ltn12 standards
ltn12 avoids coroutines (so you can go wild on the C side)
automated tests for ftp now in use
new compat-5.1 distribution
    instalation should use new directory structure
    namespace hierarchy is in now back in use (socket.url instead of url)
    globals not visible from inside namespaces
    all modules call "require" even for standard libraries
kludge on wsocket.c:sock_send for windows moved to buffer.c:sendraw
socket.protect only catches errors thrown by socke.try
udp:sendto was calling sock_send
close wasn't returning 1
gettime returns time since Unix Epoch 1/1/1970 (UTC)
sleep is robust to interrupts
select had a stupid bug
http.PROXY etc wasn't working